开发了一种高效的立体选择性反式环丙烷化反应,用于合成3-烷基亚基氧化吲哚与现场生成的α-重氮羰基化合物或α,β-不饱和重氮化合物的反应,无需金属条件即可合成3-螺环丙基-2-氧化吲哚衍生物。该方法基于相应重氮化合物在碱催化条件下的1,3-偶极特性。该方法具有广泛的底物范围,并使用易于获得的起始材料。
A short and robust approach for the synthesis of 2-(hetero)aryl substituted thieno[2,3-
An efficient tosylhydrazine-mediated conjugate reduction of 3-phenacylideneoxindole and sequential Michael/intramolecular aldol reaction is reported under base-catalyzed conditions towards the formation of densely substituted dispirocyclopentanebisoxindole derivatives. The reaction proceeded in a diastereoselective manner to afford four chiral stereocenters. The method also has advantages of wide substrate scope, readily available starting materials and operational simplicity through one pot reaction.