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Synthesis 2017; 49(11): 2523-2534
DOI: 10.1055/s-0036-1588734
DOI: 10.1055/s-0036-1588734
paper
Fused Pyrrolo[2,3-d]pyrimidines (7-Deazapurines) by Palladium-Catalyzed Direct N–H and C–H Arylation Reactions
Further Information
Publication History
Received: 06 January 2017
Accepted after revision: 27 January 2017
Publication Date:
02 March 2017 (online)


Abstract
Palladium-catalyzed intramolecular direct C–H arylations for the synthesis of hitherto unknown fused hetero systems containing an incorporated pyrrolo[2,3-d]pyrimidine scaffold are described. Pyrimido[5′,4′:4,5]pyrrolo[2,1-a]isoindoles were synthesized from 2,4-diarylpyrrolo[2,3-d]pyrimidines and o-bromobenzyl bromides by using a cascade N-benzylation/C–H arylation reaction sequence. A series of pyrimido[5′,4′:4,5]pyrrolo[1,2-f]phenanthridines were successfully assembled via a domino process involving the palladium-catalyzed direct double C–H arylation reactions of 2,4,7-triarylpyrrolo[2,3-d]pyrimidines with o-bromoiodobenzenes.
Key words
arylation - catalysis - cyclization - domino reaction - fused-ring systems - heterocycles - palladium - 7-deazapurinesSupporting Information
- Supporting information for this article is available online at http://dx.doi.org/10.1055/s-0036-1588734.
- Supporting Information