Studies on Antibiotics and Related Substances. IV. Synthesis of DL-threo-β-Cyclohexylserine and DL-threo-2-Dichloroacetamido-1-cyclohexylpropane-1,3-diol
作者:Sumio Umezawa、Yoshihisa Oguma
DOI:10.1246/bcsj.29.987
日期:1956.9
When the N-acetyl ethyl ester of Erlenmeyer’s phenylserine was reduced with hydrogen over Raney nickel catalyst, ethyl DL-threo-N-acetyl-β-cyclohexylserinate was obtained in crude yields as high as 86.8 %. Subsequent hydrolysis with dilute hydrochloric acid afforded DL-threo-β-cyclohexylserine, which gave hexahydrobenzaldehyde by periodate oxidation. (2) Raney nickel reduction of ethyl DL-threo-β-cyclohexyl-serinate
(1) Erlenmeyer苯丝氨酸的N-乙酰乙酯在阮内镍催化剂上用氢气还原,得到DL-苏式-N-乙酰-β-环己基丝氨酸乙酯,粗收率高达86.8%。随后用稀盐酸水解得到 DL-苏-β-环己基丝氨酸,通过高碘酸盐氧化得到六氢苯甲醛。(2) DL-threo-β-环己基丝氨酸乙酯的阮内镍还原得到DL-threo-2-amino-1-cyclohexylpropane-1, 3-diol。氨基醇被转化为 DL-threo-2-dichloroacetamido-1-cyclohexylpropane-1,3-diol,一种氯霉素类似物。