D-Valinol → t-Butyl alpha-[6(R)-(1-ethoxycarbonyl-3-phenylpropylamino)-3(R)-isopropyl-5-oxoperhydro-1,4-thiazepin-4-yl]acetate

Participants

Reaction Steps

The procedure described in steps (a) to (h) of Example 1 was repeated, except that D-2-amino-3-methyl-1-butanol was used as the starting material. Two isomers (derived from the asymmetric carbon atom to which the phenethyl group is attached), that is t-butyl α-{6(R)-[1(R)-ethoxycarbonyl-3-phenylpropylamino]-3(R)-isopropyl-5-oxoperhydro-1,4-thiazepin-4-yl}acetate (isomer A) and t-butyl α-{6(R)-[1(S)-ethoxycarbonyl-3-phenylpropylamino]-3(R)-isopropyl-5-oxoperhydro-1,4-thiazepin-4-yl}acetate (isomer B), were obtained as oils.

Provenance & Evidence