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J Org Chem. 2013 Jun 7;78(11):5700-4. doi: 10.1021/jo400420b. Epub 2013 May 23.

Copper(I)-catalyzed synthesis of 5-arylindazolo[3,2-b]quinazolin-7(5H)-one via Ullmann-type reaction.

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1
School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou Jiangsu 221116, PR China.

Abstract

The treatment of 2-amino-N'-arylbenzohydrazide and o-halogenated benzaldehyde in the presence of CuBr and Cs2CO3 gave 5-arylindazolo[3,2-b]quinazolin-7(5H)-one in high yields. This procedure contains an Ullmann-type reaction and provides an efficient method to construct fused tetracyclic heterocycles.

PMID:
23675901
DOI:
10.1021/jo400420b
[Indexed for MEDLINE]
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