t-Butyl alpha-[6-amino-5-oxo-2-(3-thienyl)perhydro-1,4-thiazepin-4-yl]acetate → t-Butyl alpha-[6-(1-benzyloxycarbonyl-3-phenylpropylamino)-5-oxo-2-(3-thienyl)perhydro-1,4-thiazepin-4-yl]acetate

Participants

Reaction Steps

0.3 g of t-butyl α-[6-amino-5-oxo-2-(3-thienyl)perhydro-1,4-thiazepin-4-yl]acetate [synthesized as described in Example 42(g)], was N-alkylated using 0.6 g of benzyl 2-bromo-4-phenylbutyrate by the procedure described in Example 42(h). The reaction product was chromatographed on a silica gel column eluted with a 1:40 by volume mixture of ethyl acetate and methylene chloride, to give two isomers, A and B (ascribed to the asymmetric carbon atom to which the phenethyl group is attached).

Provenance & Evidence