p-TSA catalyzed 6-endo-trig/dig cyclization of 5-aminopyrazoles and 3°/2°-propargylic alcohols: access to pyrazolo[1,5-a]dihydropyrimidines and pyrazolo[3,4-b]pyridines

Author:

Medishetti Nagaraju12,Banda Bhanu Prasad12,Atmakur Krishnaiah12ORCID

Affiliation:

1. Fluoro & Agrochemicals Department, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad, 500 007, India

2. Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India

Abstract

Facile synthesis of fused pyrazolo[1,5-a]dihydropyrimidines and pyrazolo[3,4-b]pyridines is accomplished via intramolecular 6-endo-trig/dig cyclization of 5-aminopyrazoles with 3°/2°-propargylic alcohols and ynones by using p-TSA.

Funder

Science and Engineering Research Board

Council of Scientific and Industrial Research, India

Publisher

Royal Society of Chemistry (RSC)

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