Synthesis and reactivity of hexahydropyrroloquinolines

被引:69
作者
Hadden, M [1 ]
Nieuwenhuyzen, M [1 ]
Potts, D [1 ]
Stevenson, PJ [1 ]
Thompson, N [1 ]
机构
[1] Queens Univ Belfast, Sch Chem, Belfast BT9 5AG, Antrim, North Ireland
关键词
martinellic acid; martinelline; imino Diels-Alder reaction; cyclic enamide; indium trichloride;
D O I
10.1016/S0040-4020(01)00466-5
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Formal [4+2] cycloaddition of cyclic enamides with imines derived from aromatic amines gave the 4-arylhexahydropyrroloquinoline skeleton in one step as mixtures of diastereoisomers. Aromatic imines derived from formaldehyde and methylglyoxalate also participated in this chemistry, with the latter favouring formation of the endo-cycloadduct. The cycloadducts derived from methylglyoxalate were unstable and fragmented to give highly substituted quinolines under both neutral and basic conditions. Imines derived from 3-cyanoacrolein also underwent cycloaddition and gave an advanced potential precursor to martinellic acid, albeit with poor diastereoselectivity. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:5615 / 5624
页数:10
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