Approaches to the synthesis of triterpenoids. I. Methyl group migration to the 9β-position in steroids as a route to the cucurbitacins. A possible structural feature directing epoxide cleavage rearrangements
作者:J. W. ApSimon、R. R. King、J. J. Rosenfeld
DOI:10.1139/v69-321
日期:1969.6.1
steroidal 9α, 11α-epoxides has been studied in an attempt to induce migration of the C-10 methyl group to C-9. In the case of 9α,11α-epoxyandrost-4-ene-3,17-dione, cleavage with BF3 gas in benzene led to two major products. One of these was the required 3,11α-dihydroxy-9β-methylestra-1,3,5(10)-triene-17-one, thus leading to a novel class of steroids and possibly opening a route to the synthesis of compounds
已经研究了 BF3 催化的一些甾体 9α、11α-环氧化物的裂解,试图诱导 C-10 甲基迁移到 C-9。在 9α,11α-epoxyandrost-4-ene-3,17-dione 的情况下,用 BF3 气体在苯中裂解产生两种主要产物。其中之一是所需的 3,11α-dihydroxy-9β-methylestra-1,3,5(10)-triene-17-one,从而产生一类新的类固醇,并可能开辟合成化合物的途径葫芦素类。另一个主要产品是 11α-羟基-9β-雄激素-4,8(14)-二烯-3,17-二酮。从其他环氧化物重排的研究中提出了一种可能的结构特征,将重排途径引导至这些材料,并在文献中有所报道。