ChemicalBook > CAS DataBase List > cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl-4-methylbenzenesulphonate

cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl-4-methylbenzenesulphonate

Product Name
cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl-4-methylbenzenesulphonate
CAS No.
134071-44-6
Chemical Name
cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl-4-methylbenzenesulphonate
Synonyms
CIS-TOSYLATE;Active Ester;Activity Ester;K6 / Cis Tosylate;oxymethyl-1,3-dioxolane;Ketoconazole IMpurity E;KETOCOZOLE EP IMPURITY E;Ketoconazole EP Impurity E;ACTIVE ESTER OF KETOCONZOL;Activity Esterof Ketoconazo
CBNumber
CB2855192
Molecular Formula
C21H20Cl2N2O5S
Formula Weight
483.36
MOL File
134071-44-6.mol
More
Less

cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl-4-methylbenzenesulphonate Property

Melting point:
120-122°C
Boiling point:
665.7±55.0 °C(Predicted)
Density 
1.44±0.1 g/cm3(Predicted)
storage temp. 
Inert atmosphere,Room Temperature
solubility 
DMSO (Slightly), Methanol (Slightly)
form 
Solid
pka
6.88±0.12(Predicted)
color 
White to Off-White
InChI
InChI=1/C21H20Cl2N2O5S/c1-15-2-5-18(6-3-15)31(26,27)29-12-17-11-28-21(30-17,13-25-9-8-24-14-25)19-7-4-16(22)10-20(19)23/h2-10,14,17H,11-13H2,1H3/t17-,21-/s3
InChIKey
WAXNIYHZFWRPGS-NTMXNBFVNA-N
SMILES
[C@@]1(OC[C@@H](COS(=O)(=O)C2C=CC(C)=CC=2)O1)(CN1C=NC=C1)C1=CC=C(Cl)C=C1Cl |&1:0,3,r|
CAS DataBase Reference
134071-44-6(CAS DataBase Reference)
More
Less

Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H332Harmful if inhaled

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P330Rinse mouth.

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P337+P313IF eye irritation persists: Get medical advice/attention.

P362Take off contaminated clothing and wash before reuse.

P402+P404Store in a dry place. Store in a closed container.

P422Store contents under …

P501Dispose of contents/container to..…

More
Less

N-Bromosuccinimide Price

TRC
Product number
D435718
Product name
cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methylp-Tolylsulfonate
Packaging
2g
Price
$255
Updated
2021/12/16
TRC
Product number
D435718
Product name
cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methylp-Tolylsulfonate
Packaging
10g
Price
$1070
Updated
2021/12/16
Biosynth Carbosynth
Product number
FD21680
Product name
cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl p-tolylsulfonate
Packaging
10g
Price
$1280
Updated
2021/12/16
American Custom Chemicals Corporation
Product number
AAA0000074
Product name
(2R,4R) CIS-(2,4-DICHLOROPHENYL)-2-(1,2,4-TRIAZOLE-1-YL-METHYL)-1,3-DIOXOLANE-4YL-METHYL-P-TOLYSULFONATE
Purity
95.00%
Packaging
10G
Price
$2055.9
Updated
2021/12/16
AK Scientific
Product number
B606
Product name
CIS-Tosylate
Packaging
1g
Price
$131
Updated
2021/12/16
More
Less

cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl-4-methylbenzenesulphonate Chemical Properties,Usage,Production

Chemical Properties

Off-White Solid

Uses

cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl p-Tolylsulfonate (Ketoconazole EP Impurity E) is an intermediate in the synthesis of the drug Ketoconazole (K186000).

cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl-4-methylbenzenesulphonate Preparation Products And Raw materials

Raw materials

Preparation Products

More
Less

cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl-4-methylbenzenesulphonate Suppliers

Conier Chem & Pharma Co.,Ltd,
Tel
023-62879767 13996269627;
Fax
+86-28-84559521
Email
sales@conier.com
Country
China
ProdList
283
Advantage
56
BTC Pharmaceutical CO. Ltd
Tel
15716293042 18862996710
Fax
0513-68015394
Email
15050603958@163.com
Country
China
ProdList
695
Advantage
55
Shanghai Taijilin Industrial Co., Ltd.
Tel
021-50630626 18964684208
Fax
021-50563898
Email
kate@tajilin.com
Country
China
ProdList
1291
Advantage
58
Ningbo Zhenlei Chemical Co.,ltd.
Tel
0576-88808091 17681642513
Fax
+0576-88203603
Email
jardon.liang@zhenleichem.com
Country
China
ProdList
122
Advantage
58
J & K SCIENTIFIC LTD.
Tel
18210857532; 18210857532
Fax
86-10-82849933
Email
jkinfo@jkchemical.com
Country
China
ProdList
96815
Advantage
76
Jia Xing Isenchem Co.,Ltd
Tel
0573-85285100 18627885956
Fax
0573-85285100
Email
isenchem@163.com
Country
China
ProdList
9310
Advantage
66
Adamas Reagent, Ltd.
Tel
400-6009262 16621234537
Fax
021-64823266
Email
chenyj@titansci.com
Country
China
ProdList
14101
Advantage
59
Shanghai Hanhong Scientific Co.,Ltd.
Tel
021-54306202 13764082696
Email
info@hanhongsci.com
Country
China
ProdList
42934
Advantage
64
Chemsky(shanghai)International Co.,Ltd.
Tel
021-50135380
Email
shchemsky@sina.com
Country
China
ProdList
32321
Advantage
50
XiaoGan ShenYuan ChemPharm co,ltd
Tel
15527621225
Email
1791901229@qq.com
Country
China
ProdList
6945
Advantage
52
Shanghai T&W Pharmaceutical Co., Ltd.
Tel
+86 21 61551611
Fax
+86 21 50676805
Country
China
ProdList
9891
Advantage
58
Shanghai Jian Chao Chemical Technology Co., Ltd.
Tel
150-2103-5486 18017383231
Fax
qq:2817624287
Email
983544897@qq.com
Country
China
ProdList
9342
Advantage
55
China Nobel Chem Co., Limited
Tel
+86(0)21 60484900
Fax
+86(0)21 60484900
Country
China
ProdList
764
Advantage
50
TargetMol Chemicals Inc.
Tel
021-021-33632979 15002134094
Fax
021-33632979
Email
marketing@targetmol.com
Country
China
ProdList
7783
Advantage
58
Sinfachem Limited
Tel
025-84683399 13952017251
Fax
025-84683112
Email
sales@sinfachem.com
Country
China
ProdList
217
Advantage
56
Bide Pharmatech Ltd.
Tel
400-164-7117 13681763483
Fax
+86-21-61629029
Email
product02@bidepharm.com
Country
China
ProdList
39966
Advantage
60
BeiJing TOP Science Bio-Technology Co., Ltd.
Tel
+86-13439059536 +86-15201677815
Email
2638315663@qq.com
Country
China
ProdList
292
Advantage
58
Shanghai Worldyang Chemical Co.,Ltd.
Tel
021-021-56795766
Fax
+86-21-56795266
Email
sales@worldyachem.com
Country
China
ProdList
9476
Advantage
58
ChemStrong Scientific Co.,Ltd
Tel
0755-0755-66853366 13670046396
Fax
0755-28363542
Email
sales@chem-strong.com
Country
China
ProdList
18333
Advantage
56
Wuhan Dahua Pharmaceutical Co., Ltd.
Tel
027-59262863 13277907145 3091977954
Fax
027-59420980
Country
China
ProdList
4942
Advantage
58
Shanghai Kewel Chemical Co., Ltd.
Tel
021-64609169 18901607656
Fax
021-64609160
Email
greensnown@163.com
Country
China
ProdList
9906
Advantage
50
Nanjing Chalf-Pharm Technology Co., Ltd.
Tel
025-57018978 18251899859
Fax
025-57018008
Email
sales@chalf-pharm.com
Country
China
ProdList
5674
Advantage
50
Hubei Jusheng Technology Co.,Ltd
Tel
027-59599241 18871490274
Fax
027-59599241
Email
1400878000@qq.com
Country
China
ProdList
9858
Advantage
58
Nanjing XiZe Biotechnology CO., Ltd.
Tel
025-58362220 0086-15250997978
Fax
025-58362220
Email
sale@njxizebio.com
Country
China
ProdList
4855
Advantage
55
Shanghai Qiao Chemical Science Co., Ltd
Tel
021-58892003
Email
info@qiaochem.com
Country
China
ProdList
6059
Advantage
65
Shanghai YuanYe Biotechnology Co., Ltd.
Tel
021-61312847; 18021002903
Fax
QQ:3008007432
Email
3008007409@qq.com
Country
China
ProdList
71826
Advantage
60
parabiochem
Tel
025-83453382-8005
Fax
025-83453382
Email
sale@parabiochem.com
Country
China
ProdList
9595
Advantage
55
Raw material medicin reagent co.,Ltd
Tel
Email
sales@njromanme.com
Country
China
ProdList
4529
Advantage
58
Amadis Chemical Company Limited
Tel
571-89925085
Fax
0086-571-89925065
Email
sales@amadischem.com
Country
China
ProdList
131957
Advantage
58
Hubei Xinyuanshun Pharmaceutical Chemical Co., Ltd.
Tel
027-50664929, 13971561712
Fax
027-50664927 / QQ: 3452835437
Email
hubxys2001@163.com
Country
China
ProdList
1437
Advantage
55
Shanghai Witofly Chemical Co. ,Ltd.
Tel
021-50630626 18964684208
Email
sales@witofly.com
Country
China
ProdList
1606
Advantage
55
Wellman Pharmaceutical Group Limited
Tel
027-027-83778875 15807197853
Fax
027-83991220
Email
15807197853@163.com
Country
China
ProdList
3932
Advantage
58
Taian Jiaye Biotechnology Co.Ltd
Tel
13127280945
Email
285424065@qq.com
Country
China
ProdList
9976
Advantage
55
Hangzhou Molcore Biopharmatech Co.,Ltd
Tel
400-711-5280 86-571-81025280
Fax
86-571-85806285
Email
sales@molcore.com
Country
China
ProdList
9967
Advantage
58
Jiaxing Deyi Chemical Co., Ltd.
Tel
86-0573-85866609 13325730825
Fax
0573-85866609
Email
945717149@qq.com
Country
China
ProdList
8595
Advantage
58
Aikon International Limited
Tel
025-58859352 18068836627
Fax
02557626880
Email
sales01@aikonchem.com
Country
China
ProdList
15083
Advantage
58
Wuhan FengyaoTonghui Chemical Products Co., Ltd.
Tel
027-87466105 15377573527
Email
2678564200@qq.com
Country
China
ProdList
17987
Advantage
58
Shanghai Haohong Pharmaceutical Co., Ltd.
Tel
400-8210725 400821072
Fax
021-58955996
Email
malulu@leyan.com
Country
China
ProdList
25000
Advantage
58
Tianjin heowns Biochemical Technology Co., Ltd.
Tel
400-6387771-6039 18920764717
Email
sales@heowns.com
Country
China
ProdList
23771
Advantage
60
Henan Aosman Biotechnology Co., LTD
Tel
0371-0371-61318675 17719817155
Fax
0371-61318675
Email
sales@xlinebio.com
Country
China
ProdList
2857
Advantage
58
Hubei Xinyuanshun Pharmaceutical Chemical Co., Ltd.
Tel
027-51831887 15337167856
Fax
027-51837635 QQ1165326703
Email
hubeixinyuanshun@163.com
Country
China
ProdList
10295
Advantage
58
GUANGZHOU CHANGTHINKING IMP.&EXP.CO.,LTD
Tel
020-37651955 13682223272
Fax
020-87659730
Email
173901442@qq.com
Country
China
ProdList
694
Advantage
58
yxinchem
Tel
+86-0710-4323688 +86-18071785587
Fax
15502706050
Email
market@yxinchem.com
Country
China
ProdList
1022
Advantage
58
Shaanxi Jiandu Pharmaceutical Chemical Co. Ltd.
Tel
029-88380327 17691182729
Fax
029-88380327
Email
1018@dideu.com
Country
China
ProdList
2011
Advantage
58
Shenzhen Polymeri Biochemical Technology Co., Ltd.
Tel
+86-400-002-6226 +86-13028896684;
Email
sales@rrkchem.com
Country
China
ProdList
57422
Advantage
58
Anhui Yongsheng Pharmaceutical Technology Co., Ltd.
Tel
021-50430803 18016036736
Fax
qq:1278656443
Email
lyh_antaeus@163.com
Country
China
ProdList
760
Advantage
58
Hefei TNJ Chemical Industry Co.,Ltd.
Tel
+86-0551-65418684 +8618949823763
Fax
0086-551-65418684
Email
sales@tnjchem.com
Country
China
ProdList
25356
Advantage
58
Qiuxian Baitai New Material Co., LTD
Tel
+8618330912755
Fax
+8619932103556
Email
sale2@hbyalin.com
Country
China
ProdList
1658
Advantage
58
sgtlifesciences pvt ltd
Tel
+8617013299288
Email
dj@sgtlifesciences.com
Country
China
ProdList
12373
Advantage
58
Hubei Ipure Biology Co., Ltd
Tel
+8613367258412
Fax
18062427325
Email
ada@ipurechemical.com
Country
China
ProdList
10237
Advantage
58
More
Less

View Lastest Price from cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl-4-methylbenzenesulphonate manufacturers

Qiuxian Baitai New Material Co., LTD
Product
Cis - (2 - (2, 4 - dichlorobenzene) - 2 - (1 h - imidazole 1 - methyl) - 1, 3 - dioxolane - 4 - base) methanol p-toluene sulfonic acid ester 134071-44-6
Price
US $2.00/g
Min. Order
1KG
Purity
99%
Supply Ability
5ton/Month
Release date
2021-12-21
Career Henan Chemical Co
Product
cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl-4-methylbenzenesulphonate 134071-44-6
Price
US $1.00/KG
Min. Order
1KG
Purity
95%-99%
Supply Ability
1000kg
Release date
2018-12-24

134071-44-6, cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl-4-methylbenzenesulphonateRelated Search:


  • cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl-4-methylbenzenesulphonate
  • CIS-2-(2,4-DICHLOROPHENYL)-2-(1H-IMIDAZOLE-1-YL)METHYL-4-(P-TOLUENE SULFONYLOXY) METHYL-1,3-DIOXALANE
  • CIS-[2-(2,4-DICHLOROPHENYL)-2-(1H-IMIDAZOL-YL METHYL)-1,3-DIOXOLANE-4-YL]-P-METHYLBENZENE SULFONATE
  • CIS-TOSYLATE
  • ACTIVITY ESTEROF KETOCONAZOL
  • CIS-[2-(2,4-DICHLOROPHENYL)-2-(1H-IMIDAZOL-YL METHYL)-1,3-DIOXOLANE-4-YL]-P-METHYLBENZENE SULFONATE OR -P-METHYL SULFONATE (KETOCONAZLE INTERMEDIATE)
  • Ketoconazole EP Impurity E
  • Cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-l-ylmethyl)- 1,3-dioxolan-4-yl]methyl-4-methylbenzenesulphonate (CisTosylate)
  • Ketoconazole Impurity 5(Ketoconazole EP Impurity E)
  • 2-[[2-(2,4-dichlorophenyl)-2-(1-imidazolylmethyl)-1,3-dioxolan-4-yl]methyl]-4-methylbenzenesulfonate
  • CIS-2-(2 4- DICHLOROPHENYL)-2-(1-H-IMIDA ZOLE-YL-METHYL) -1 3-DIOXOLAN-4-YL] METH YL-4-METHYLBENZENESULPHONATE
  • CIS-2-(2,4-DICHLOROPHENYL)-2-(1H-IMIDAZOLE-1-YL)METHYL-4-(P-TOLUENESULFONYLOXY)METHYL-1,3-DIOXALANE
  • Cis-Tosylate(Cis-2-Dichlorophenyl)2-(Ih-Imidazole-1-Yl)Methyl-4-(P-TolueneSulfonyloxy)Methyl-1,3-Dioxalane
  • CIS-[2,4-DICHLOROPHENYL)-2-(1H-IMIDAZOL-1-YLMETHYL)-1,3-DIOXOLAN-4-YL]METHYL-4-TOLYLSULFONATE
  • Active Ester
  • 1,3-Dioxolane-4-Methanol,2-(2,4-dichlorophenyl)-2-(1H-iMidazol-1-ylMethyl)-,4-(4-Methylbenzenesulfonate), (2R,4R)-rel-
  • (2R,4R)-rel-2-(2,4-Dichlorophenyl)-2-(1H-iMidazol-1-ylMethyl)-1,3-dioxolane-4-Methanol 4-(4-Methylbenzenesulfonate)
  • CIS-2-(2,4-DICHLOROPHENYL)-2-(1H-IMIDAZOLE-1-YL)METHYL-4-(P-TOLUENE SUIFONYLOXY)METHYL-1,3-
  • Cis-2-(2,4-dichlorophenyl)-2-(1H-imidazol-1yl-methyl)-4-(p-toluensulfonyl)
  • oxymethyl-1,3-dioxolane
  • (Z)-2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-ylmeth
  • (cis-2-((1H-IMidazol-1-yl)Methyl)-2-(2,4-dichlorophenyl)-1,3-dioxolan-4-yl)Methyl 4-Methylbenzenesulfonate
  • Ketoconazole IMpurity E
  • Activity Esterof Ketoconazo
  • Activity Ester
  • ((2R,4R)-rel-2-((1H-Imidazol-1-yl)methyl)-2-(2,4-dichlorophenyl)-1,3-dioxolan-4-yl)methyl 4-methylbenzenesulfonate
  • (cis-2-((1H-Imidazol-1-yl)methyl)-2-(2,4-dichlorophenyl)-1,3-dioxolan-4-yl)methyl 4-methylbenz
  • CIS-TOSYLATE, CIS-[2-2,4-DICHLOROPHENYL]-2-(1H-IMIDAZOL-1-YLMETHYL)-1,3-DIOXOLAN-4-YL]METHYL-4-METHYLBENZENESULPHONATE
  • (2R,4R) CIS-(2,4-DICHLOROPHENYL)-2-(1,2,4-TRIAZOLE-1-YL-METHYL)-1,3-DIOXOLANE-4YL-METHYL-P-TOLYSULFONATE
  • CIS-[2,4-DICHLOROPHENYL)-2-(1H-IMIDAZOL-1-YLMETHYL)-1,3-DIOXALAN-4-YL]METHYL-P-TOLYSULFONATE
  • (cis-2-((1H-Imidazol-1-yl)methyl)-2-(2,4-dichlorophenyl)-1,3-dioxolan-4-yl)methyl 4-methylbenzene
  • Cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl-4-methylbenzenesulphonate (134071-44-6)
  • [(2RS,4SR)-2-(2,4-Dichlorophenyl)-2
  • CIS TOSYLATE : Cis-2-(2,4-Dichlorophenyl)-2-(1H-Imidazole-1-yl)Methyl)-4-(p-Toluene Sulfonyloxy)methyl-1,3-Dioxalane)
  • ACTIVE ESTER OF KETOCONZOL
  • Cis - (2 - (2, 4 - dichlorobenzene) - 2 - (1 h - imidazole 1 - methyl) - 1, 3 - dioxolane - 4 - base) methanol p-toluene sulfonic acid ester
  • cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-d...
  • K6 / Cis Tosylate
  • [(2RS,4SR)-2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl 4-methylbenzenesulfonate
  • KETOCOZOLE EP IMPURITY E
  • Cis-(2-(2,4-Dichlorophenyl)-2-(lH- Imidazot-1- yl-Methyl)-1,3- Dioxolan-4-yl}methyl-4-Methanol
  • CIS-[2-2,4-DICHLOROPHENYL-2-(1H-IMIDAZOL-1-YLMETHYL)-1,3-DIOXOLAN-4YL]METHYL-4-METHYLBENZENESULPHONATE(Cis Tosylate)
  • Ketoconazole Intermediate 1e
  • (cis-2-((1H-Imidazol-1-yl)methyl)-2-(2,4-dichlorophenyl)-1,3-dioxolan-4-yl)methyl 4-methylbenzenesul
  • [(2R,4R)-2-(2,4-dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl 4-methylbenzenesulfonate
  • (2RS,4SR)-2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl 4-Methylbenzen
  • cis-[2-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl-4-methylbenzenesulphonate
  • Ketoconazole Imp.E(EP): [(2RS,4SR)-2-(2,4-dichlorophenyl)-2-[(1H-imidazol-1-yl)methyl]-1,3-dioxolan-4-yl]methyl 4-methylbenzene-1-sulfonate
  • 134071-44-6
  • 124071-44-6
  • C21H20Cl2N2O5S
  • Aromatics
  • Intermediates & Fine Chemicals
  • Pharmaceuticals
  • Heterocycles
  • Intermediates
  • Sulfur & Selenium Compounds
  • Pharmaceutical Intermediates