N-(Methoxymethyl)-N-(trimethylsilylmethyl)benzylamine Property

Boiling point:

76 °C0.3 mm Hg(lit.)

Density 

0.928 g/mL at 25 °C(lit.)

refractive index 

n20/D 1.492(lit.)

Flash point:

151 °F

storage temp. 

Keep in dark place,Sealed in dry,Room Temperature

solubility 

Soluble in chloroform, ethyl acetate.

form 

Liquid

pka

7.29±0.50(Predicted)

Specific Gravity

0.928

color 

Clear colorless to light yellow

Hydrolytic Sensitivity

2: reacts with aqueous acid

Sensitive 

Moisture & Light Sensitive

BRN 

4311216

InChIKey

RPZAAFUKDPKTKP-UHFFFAOYSA-N

CAS DataBase Reference

93102-05-7(CAS DataBase Reference)

Safety

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-37/39

RIDADR 

1993

WGK Germany 

3

HazardClass 

3

PackingGroup 

Ⅲ

HS Code 

29319090

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

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

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P271Use only outdoors or in a well-ventilated area.

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

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

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

N-(Methoxymethyl)-N-(trimethylsilylmethyl)benzylamine Chemical Properties,Usage,Production

Preparation

N-Methoxymethyl-N-(trimethylsilylmethyl)benzylamine is most conveniently prepared by treatment of benzylamine with chloromethyltrimethylsilane followed by formaldehyde and methanol. Access to higher ether homologs is achieved by replacing methanol with the appropriate alcohol. An alternate procedure involves alkylation of lithium N-benzyltrimethylsilymethylamide with methoxymethyl chloride.

Chemical Properties

N-(Methoxymethyl)-N-(trimethylsilylmethyl)benzylamine is clear colorless to light yellow liquid

Physical properties

bp 77–80°C/0.5 mmHg.

Uses

N-Methoxymethyl-N-(trimethylsilylmethyl)benzylamine forms azomethine ylides which readily undergo [3+2] cycloaddition to α,?-unsaturated esters affording N-benzyl substituted pyrrolidines in good yields. It reacts with asymmetric 1,3-dipolar cycloadditions in the practical, large-scale synthesis of chiral pyrrolidines. It is used in the the synthesis of 3-carboxy-1-azabicyclo[2.2.1]heptane derivatives, an important class of physiologically active compounds.

Uses

N-Benzyl-N-(methoxymethyl)- N-trimethylsilylmethylamine (1) is a valuable reagent for in situ generation of the N-benzyl azomethine ylide (2). It is generally preferred over alternative silylmethylamine precursors6–8 because of ease of handling and use. The ylide (2) is most conveniently generated from (1) using a catalytic amount of trifluoroacetic acid as described by Achiwa.Alternative catalysts include LiF, TBAF,Me3SiOTf–CsF, or Me3SiI–CsF. Mechanistic studies provide evidence that the reactive intermediate generated from (1) with either CF3CO2H or F? is a 1,3-dipolar species. Reaction of (2) with alkenes provides an efficient convergent route to pyrrolidine derivatives. Alkynes afford 3-pyrrolines which can be converted into pyrroles.The ylide (2) reacts most readily with electron deficient alkenes and alkynes since this pairing results in a narrow dipole HOMO–dipolarophile LUMO energy gap.Examples of suitable dipolarophiles include unsaturated esters, ketones, imides,nitriles,and sulfones. Cycloaddition occurs with complete cis stereospecificity (eq 1) which is consistent with a concerted mechanism. Dipolarophiles containing an endocyclic double bond afford fused bicyclic pyrrolidines, whereas substrates with an exocyclic double bond provide access to spirocyclic systems.

Uses

N-(Methoxymethyl)-N-(trimethylsilylmethyl)benzylamine is useful reagent in synthesizing N-benzyl substituted pyrrolidines by [3+2] cycloaddition to α,ßunsaturated esters.

Preparation

most conveniently prepared by treatment of benzylamine with chloromethyltrimethylsilane followed by formaldehyde and methanol.Access to higher ether homologs is achieved by replacing methanol with the appropriate alcohol. An alternate procedure involves alkylation of lithium N-benzyltrimethylsilymethylamide with methoxymethyl chloride.