cis-spirovetivanes was constructed with high stereoselectivity by the phosphine-catalyzed [3+2] cycloaddition reaction of tert-butyl 2,3-butadienoate or 2-butynoate with 3-methyl-2-methylenecyclohexanone (5). This method was exemplified by the first highly efficient total synthesis of natural product (-)-hinesol, which is an active ingredient of cerebral circulation and metabolism improvers.
第一步,通过膦催化2,3-
丁二烯酸叔丁酯或2-
丁酸叔丁酯与3-甲基-2-亚甲基
环己酮的
膦酸酯催化的[3 + 2]环加成反应,构建了具有高立体选择性的顺式螺维酮骨架。(5 )。这种方法以自然产物(-)-海因索尔的第一个高效的全合成为例,后者是脑循环和代谢改善剂的活性成分。