An efficient one-pot synthesis of fused pyrazoles has been developed. The procedure involved three components reaction of o-alkynylaldehydes 1a-s with ketones 2a-m and hydrazine under mild, metal-free reaction conditions. The desired products were obtained in one-step up to 85% yield. The molecular structure was confirmed by the X-ray crystallographic analysis. (C) 2014 Elsevier Ltd. All rights reserved.
Efficient synthesis of fused pyrazoles via simple cyclization of o-alkynylchalcones with hydrazine
作者:Ying Li、Chun-E. Dong
DOI:10.1016/j.cclet.2015.01.002
日期:2015.5
The synthesis of pyrazole derivatives from o-alkynylchalcones and hydrazine via simplecyclization is described. This greener synthetic methodology provides a straightforward approach to the synthesis of a variety of pyrazole derivatives under mild reaction condition.