Syntheses of 1,2-Thiaphospholes and Their Thermal and Lewis Acid-Promoted Addition Reactions
作者:Ikuo Shinoda、Akihiko Takahashi、Takao Saito、Tokiko Uchida
DOI:10.1246/bcsj.67.2785
日期:1994.10
norbornadiene, norbornene or diethyl azodicarboxylate to produce the 1 : 2 double Diels–Alder cycloadducts. With a mixture of norbornadiene and methyl acrylate or acrylonitrile, the crossed double Diels–Alder cycloadducts were obtained. In the presence of a Lewis acid, the thiaphospholes underwent, at the initial step, the Diels–Alder reaction with acrylic esters, methyl vinyl ketone or acrylonitrile, followed
通过用 n-Bu3P 处理 2,9-dithia-1-phosphabicyclo[4.3.0]nona-3,7-diene 1-sulfides 有效地制备了 3,5-Di-取代的 1,2-thiaphospholes。硫磷与降冰片二烯、降冰片烯或偶氮二羧酸二乙酯发生热反应,生成 1:2 的双 Diels-Alder 环加合物。用降冰片二烯和丙烯酸甲酯或丙烯腈的混合物,得到了交叉的双 Diels-Alder 环加合物。在路易斯酸的存在下,硫杂磷化合物在初始步骤中与丙烯酸酯、甲基乙烯基酮或丙烯腈发生狄尔斯-阿尔德反应,然后依次将 1:1 环加合物迈克尔加成到另一个分子的反应物。