Nitriles in Heterocyclic Synthesis: Synthesis of New Pyrazolo [1,5-a]pyrimidines, Pyrano[2,3-c]pyrazoles and Pyrano[3,4-c] pyrazoles
作者:Galal Eldin Hamza Elgemeie、Bahia Y. Riad、Galal A. Nawwar、Sherif Elgamal
DOI:10.1002/ardp.19873200307
日期:——
New pyrazolo[1,5‐a]pyrimidines, pyrano[2,3‐c]pyrazoles and pyrano[3,4‐c]pyrazoles were synthesised by reaction of the α,β‐unsaturated nitriles 1, 13 and 16 with 3‐amino‐2‐pyrazolin‐5‐one (2), 1‐phenylpyrazolidine‐3,5‐dione (5), and 5‐amino‐3‐phenylpyrazole (10).
新的吡唑并[1,5-a]嘧啶、吡并[2,3-c]吡唑和吡并[3,4-c]吡唑是通过α、β-不饱和腈1、13和16与3-反应合成的氨基-2-吡唑啉-5-酮 (2)、1-苯基吡唑烷-3,5-二酮 (5) 和 5-氨基-3-苯基吡唑 (10)。