Transesterification of benzyloxycarbony1 protected amino acid Z-Asn-OH with t-butyl acetate in the presence of perch1oric acid led the formation of Z-Asn-OBut in 95% yield.Hydrolysis of benzyloxycarbony1 group from th...Transesterification of benzyloxycarbony1 protected amino acid Z-Asn-OH with t-butyl acetate in the presence of perch1oric acid led the formation of Z-Asn-OBut in 95% yield.Hydrolysis of benzyloxycarbony1 group from the intermediate Z-Asn-OBut under Pd/C gave the final product H-Asn-OBut in 96% yield.The influence of the reaction parameters on the transesterification reaction was discussed.展开更多
文摘Transesterification of benzyloxycarbony1 protected amino acid Z-Asn-OH with t-butyl acetate in the presence of perch1oric acid led the formation of Z-Asn-OBut in 95% yield.Hydrolysis of benzyloxycarbony1 group from the intermediate Z-Asn-OBut under Pd/C gave the final product H-Asn-OBut in 96% yield.The influence of the reaction parameters on the transesterification reaction was discussed.