Stereo-controlled synthesis of polyheterocycles via the diene-transmissive hetero-Diels–Alder reaction of β,γ-unsaturated α-keto esters
作者:Takashi Otani、Yumiko Tamai、Kazunori Seki、Tomohiro Kikuchi、Taiichiro Miyazawa、Takao Saito
DOI:10.1039/c5ob00503e
日期:——
stereoselective synthesis of polyring-fused heterocyclic compounds based on diene-transmissive hetero-Diels–Alder reactions utilizing β,γ-unsaturated α-keto esters. This protocol involves the initial endo- or exo-selective Diels–Alder (DA) reactions with electron-rich dienophiles, methylenation of the ester carbonyl groups with the Tebbe reagent, and a stereoselective second DA reaction with electron-deficient
我们描述了基于二烯透射性杂Diels-Alder反应的利用β,γ-不饱和α-酮酯的多环稠合杂环化合物的立体选择性合成。该方案涉及与富电子的亲双烯体的初始内选择性或外选择性Diels-Alder(DA)反应,用Tebbe试剂对酯羰基进行甲基化,以及与电子缺乏的亲双烯体的立体选择性第二DA反应。在初始反应中使用对映选择性DA反应,可以得到具有多个手性中心的手性多环稠合杂环化合物。