Glycine ethyl ester, hydrochloride → HCID 10830513, compound

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Reaction Steps

7.07 g (0.066 mol) of glycine ethyl ester, hydrochloride are diluted in 200 ml of dry methanol and 3.32 g (0.053 mol) of sodium cyanoborohydride are added, while stirring under nitrogen. To this solution, 15 g (0.0608 mol) of 3-chlorobenzyloxybenzaldehyde are added in a single portion. Stirring is continued for 18 hours at room temperature, the mixture is evaporated to dryness and the crude residue chromatographed on silica gel (eluant: cyclohexane/ethyl acetate; 60/40). 6.8 g (34%) of [4-(3-chlorobenzyloxy)benzyl]amino acetic acid, ethyl ester are obtained (m.p. 114°-115° C. as hydrochloride). 3 g (0.0090 mol) of the above ester (free base) are heated in 70 ml of dimethylamine at 60° C. for 7 hours. The solution is allowed to stand overnight at room temperature, then evaporated and the residue is purified on silica gel (eluant: chloroform/methanol/30% NH4OH; 95/5/0.5) to afford 0.7 g (23%) of [4-(3-chlorobenzyloxy)benzyl]amino-N,N-dimethylacetamide, hydrochloride (m.p. 120°-125° C.). Analogously the following compounds can be obtained, starting from the corresponding ethyl esters:

Provenance & Evidence