作者:K. I. Kuchkova、A. N. Aryku、I. P. Dragalin、P. F. Vlad
DOI:10.1007/s10600-005-0109-8
日期:2005.3
Drim-9(11)-en-8α-ol and drim-9(11)-en-8β-ol were synthesized in six steps from drimenol. Drimenol was oxidized by P2O5 and DMSO to drimenal, which isomerized with p-TsOH into isodrimenal. Isodrimenal was reduced by NaBH4 into isodrimenol, epoxidation of which by m-CPBA gave a mixture (3.4:1) of α- and β-epoxyisodrimenols. These reacted with tosyl chloride in Py to give a mixture of α- and β-epoxyisodrimenol tosylates. Treatment of the tosylate mixture with KI and then Ph3P produced a mixture of drim-9(11)-en-8α- and -8β-ols that was separated chromatographically. The overall yield was ∼26%.
Drim-9(11)-en-8α-醇和drim-9(11)-en-8β-醇是通过六个步骤从drimenol合成的。drimenol先由P2O5和DMSO氧化为drimenal,随后在p-TsOH的催化下异构化为isodrimenal。isodrimenal再通过NaBH4还原为isodrimenol,接着用m-CPBA进行环氧化,得到混合物(3.4:1)的α-和β-环氧isodrimenol。这些化合物与吡啶中的tosyl氯反应,生成α-和β-环氧isodrimenol tosylates的混合物。将该tosylate混合物与KI及Ph3P处理后,分离得到drim-9(11)-en-8α-和-8β-醇的混合物,通过色谱分离。这一系列反应的总体产率约为26%。