作者:Giorgio Abbiati、Valentina Canevari、Diego Facoetti、Elisabetta Rossi
DOI:10.1002/ejoc.200600625
日期:2007.1
2,3,4-tetrahydrocarbazoles by Diels-Alder cycloaddition reactions between [(E)-2-vinyl]indole-1-carboxylic acid ethyl esters and open-chain C=C dienophiles is reported and discussed. The reactions proceed with high regioselectivity whereas the diastereoselectivity ranges from moderate to excellent depending on the substitution pattern on both the dienes and dienophiles and on the catalyst employed.
[(E)-2-乙烯基]吲哚-1-羧酸乙酯与开链C=C亲二烯体之间的Diels-Alder环加成反应合成非对映异构体3,4-二取代1,2,3,4-四氢咔唑被报道和讨论。反应以高区域选择性进行,而非对映选择性范围从中等到极好,具体取决于二烯和亲二烯体的取代模式以及所用催化剂。