A new approach to construction of isoindolo[1,2-a]isoquinoline alkaloids Nuevamine, Jamtine, and Hirsutine via IMDAF reaction
作者:Fedor I. Zubkov、Julya D. Ershova、Anna A. Orlova、Vladimir P. Zaytsev、Eugeniya V. Nikitina、Alexandr S. Peregudov、Atash V. Gurbanov、Roman S. Borisov、Victor N. Khrustalev、Abel M. Maharramov、Alexey V. Varlamov
DOI:10.1016/j.tet.2009.02.024
日期:2009.5
The interaction between 1-furyl-1,2,3,4-tetrahydroisoquinolines and Unsaturated acids derivatives (acryloyl, methacryloyl, and crotonoyl chloride, maleic and citraconic anhydride) was studied. It was shown that the reaction proceeds via amide formation and Subsequent intramolecular Diels-Alder reaction of the furan (IMDAF). The [4+2] cycloaddition proceeded under mild reaction conditions (25-80 degrees C) and afforded only the exo-adduct in a high yield. With this method, a new approach to the isoindolo[1,2-a]isoquinoline system, the basic structural element of alkaloids Jamtine, Hirsutine, and Nuevamine, is proposed. (C) 2009 Elsevier Ltd. All rights reserved.