On treatment with LAH the 4-tosylmethyl substituted exo-10-oxatricyclo[5.2.1.02,6]decadienones 1 and 3 undergo two consecutive, regioselective and stereospecific reductions. The first reduction constitutes an SN2′ displacement of the allylic tosyl group, the second a 1,2-reduction of the resulting exo-cyclic enone to form the α-methylene cyclenols 7 and 8, respectively. These products are smoothly
用
LAH治疗后,4-
甲苯磺酰基甲基取代的exo-10-oxatricyclo [5.2.1.0 2,6 ]癸二烯酮1和3经历了两个连续的区域选择性和立体特异性还原。第一减速构成小号Ñ烯丙基
甲苯磺酰基的2'位移,第二1,2-还原所得的外切-环烯酮以形成α亚甲基cyclenols 7和8,分别。使用快速真空热解技术进行所需的环还原反应,可以将这些产物平稳地转化为α-亚甲基-
环戊烯醇和α-亚甲基-
环戊烯酮。