One??Step Synthesis of 2??Amino??5H??pyrimido [5, 4??b] indoles, Substituted 2??(1, 3, 5??triazin??2??yl)??1H??indoles, and 1, 3, 5??Triazines from Aldehydes
S Biswas, S Batra
Index: Biswas, Subhasish; Batra, Sanjay European Journal of Organic Chemistry, 2012 , # 18 p. 3492 - 3499
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Abstract
Abstract An efficient one-step synthesis of 2-amino-5H-pyrimido [5, 4-b] indoles through a copper-catalyzed cascade reaction between 3-haloindole-2-carbaldehydes and guanidine hydrochloride is described. In contrast, the base-mediated reactions of either 3-haloindole-2- carbaldehydes or substituted indole-2-carbaldehydes with substituted amidine hydrochlorides in DMSO result in the formation of 2-(1, 3, 5-triazin-2-yl)-1H-indole ...
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