Enantioselective synthesis of functionalised tetrahydrocarbazoles via an organocatalysed Diels–Alder/ene reaction strategy
摘要:
Functionalised tetrahydrocarbazoles are accessed through an enantioselective organocatalysed Diels-Alder reaction of 3-vinyl-1H-indole with a suitable dienophile in combination with an in situ N-protection. A subsequent diastereospecific ene reaction is then used to transfer chirality from the 10a to the 5 position with rearomatisation of the indolic ring, to give the target tetrahydrocarbazoles with high % ee. The in situ introduction of different N-protecting groups is explored along with their influence on the subsequent ene reactions. (C) 2015 Elsevier Ltd. All rights reserved.
Asymmetric Diels-Alder Reactions of Vinylindoles Using Organocatalysis
作者:Luca Bernardi、Alfredo Ricci、Claudio Gioia
DOI:10.1055/s-0029-1217046
日期:2010.1
The different behavior of 3- and 2-vinylindoles in Diels-Alder cycloaddition reactions in the presence of bifunctional hydrogen bond donor organocatalysts is described. asymmetric catalysis - Diels-Alderreactions - kinetic resolution - organocatalysis - vinylindoles