The synthesis and osmylation of 7,8-dideoxy-1,2:3,4-di-O-isopropylidene-β-l-glycero-d-galacto-oct-7-enopyranose and related studies
作者:John S. Brimacombe、Abul K.M.S. Kabir
DOI:10.1016/0008-6215(88)85079-1
日期:1988.3
Abstract A stereocontrolled route to 7,8-dideoxy-1,2:3,4-di- O -isopropylidene-β- l - glycero - d - galacto -oct-7-enopyranose ( 8 ) has been developed from 6,7-anhydro-1,2:3,4-di- O -isopropylidene-β- l - erythro - d - galacto -octopyranose ( 15 ), in which the final and key step involved a facile, reductive elimination on the epoxy-iodide 18 . As predicted by Kishi's empirical rule, the major product
摘要从6,7开发了7,8-二脱氧-1,2:3,4-二-O-异亚丙基-β-1-甘油-d-半乳糖-oct-7-enopyranose(8)的立体控制路线。 -脱水-1,2:3,4-二-O-异亚丙基-β-1-赤型-d-半乳糖-八聚吡喃糖(15),其中最后一个关键步骤涉及对环氧碘化物的简便还原还原18。如Kishi的经验法则所预测,通过8或其6-O-苄基衍生物21的催化渗透作用获得的主要产物具有β-1-赤型-d-半乳糖构型(即分别为19或22)。