New and simple protocols are described for the conversion of the enzymatically-derived and enantiomerically pure cis-1,2-dihydrocatechol 7 (X = I) and its 6-methylated derivative into either antipodal form of compounds embodying the tricyclic frameworks of terpenoids 1–6. Key steps include intramolecular Diels–Alder (IMDA) and (in some cases) singlet or triplet-based photochemical processes.
                                    新描述了将酶促衍生的具有光学纯度的顺式-1,2-二氢
邻苯二酚7(X = I)及其6-甲基化衍
生物转化为体现
萜类化合物1-6的含
三环骨架的两种相反构型的化合物的简单协议。关键步骤包括分子内的狄尔斯-阿尔德反应(I
MDA)以及在某些情况下的单重态或三重态为基础的光
化学过程。