Two types of regioisomeric methyl 5-methylenetetrahydropyran-3-carboxylate derivatives 3a–c and 6a–c were synthesized stereoselectively starting from the Baylis–Hillman adducts via the allyltributylstannane-mediated vinyl radical cyclization as the key step.
从Baylis-Hillman加合物通过
烯丙基三丁基锡烷介导的
乙烯基自由基环化反应,以立体选择性的方式选择性合成了两种类型的5-亚甲基
四氢吡喃-3-
甲酸甲酯甲基区域异构体衍
生物3a – c和6a – c。