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TETRAHEDRON LETTERS
卷 43, 期 7, 页码 1205-1208出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(01)02359-0
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The synthesis of new tricyclic azaindolic analogs of the hormone melatonin is described. Treatment of 1-(4-bromo-butyl)pyrrolo[3,2-b]pyridine derivative with tributyltin hydride and AlBN results in radical cyclisation to give the 6,7,8,9-tetrahydropyrido[2,3-b]indolizine ring system. A new synthetic approach of pyridopyrrolo[2,1-b][1,3]oxazine moiety is shown to be accomplished readily from 1-(3-bromopropyl)-2-oxopyrrolopyridine derivative with sodium hydride in N,N-dimethylformamide. (C) 2002 Published by Elsevier Science Ltd.
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