Intermolecular polar [4π++ 2π] cycloadditions of cationic 2-azabutadienes from thiomethylamines: a new and efficient method for the regio-and diastereo-selective …
U Beifuss, S Ledderhose
Index: Beifuss, Uwe; Ledderhose, Sabine Journal of the Chemical Society, Chemical Communications, 1995 , # 20 p. 2137 - 2138
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Citation Number: 20
Abstract
Substituted 1, 2, 3, 4-tetrahydioquinolines and related condensed nitrogen-heterocycles are formed highly regio-and diastereo-selectively with yields ranging from 57 to 100% by intermolecular polar [4π+ 2π] cycloadditions of cationic 2-azabutadienes from thiomethylamines and various dienophiles.
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