反应详情

Following a procedure similar to that described in Preparation 29, but using 5.2 g of (R)-α-t-butyldimethylsilyloxy-α-(3-chlorophenyl)acetaldehyde (prepared as described in Preparation 49), 4.24 g of methyl 4-[2(R)-amino-1-propoxy]phenylacetate (prepared as described in Preparation 27), 50 ml of absolute methanol and 3.4 g of sodium cyanoborohydride, the title compound was obtained having an Rf=0.20 (thin layer chromatography over silica gel, using a 1:4 by volume mixture of ethyl acetate and hexane as the developing solvent). [α]D23 -34.7° (c=1.024, chloroform).

1. customthat described in Preparation 29