Synthesis of lanosterol analogs with modified side chains.
作者:YOSHIHIRO SATO、YOSHIKO SONODA
DOI:10.1248/cpb.29.356
日期:——
Starting from lanosteryl acetate (1b), we synthesized twelve lanosterol analogs (cf. Chart 1-3 ; 9, 11, 14, 16, 18a, 19, 26, 27a, 28, 29, 30, 32) with different sizes of side chain and 20-iso-24-dihydrolanosterol (37), for biological studies. The analogs have shorter side chains than 1b except for the 24-ethylidene derivative (19) and 37. 20-Iso-24-di-hydrolanosterol (37) was prepared via 20-iso-22-dehydro-24-dihydrolanosterol [obtained by the Wittig reaction of 20R, S-aldehyde mixture (6, 33) with isoamyl triphenylphosphonium iodide, followed by column chromatographic separation].
从兰烯醇酯(1b)出发,我们合成了十二种不同侧链长度的兰烯醇类似物(参见图表1-3;9、11、14、16、18a、19、26、27a、28、29、30、32)和20-异-24-二氢兰烯醇(37),用于生物研究。除24-乙烯基衍生物(19)和37外,这些类似物的侧链均比1b短。20-异-24-二氢兰烯醇(37)是通过20-异-22-去氢-24-二氢兰烯醇合成的[该物质是通过将20R、S-醛混合物(6、33)与异戊基三苯基膦碘化物进行Wittig反应,然后经过柱层析分离得到的]。