化学
吡唑
戒指(化学)
乙烯
苯乙烯
催化作用
药物化学
有机化学
共聚物
聚合物
作者
Sai Teja Kolla,Nageswara Rao Rayala,Balasubramanian Sridhar,B. China Raju
摘要
1H-Pyrazole-4,5-dicarboxylates and chromenopyrazole carboxylates were prepared by reacting pyrazolines with activated alkynes under neat conditions without a catalyst. The products were formed via unexpected ring opening of pyrazolines with the elimination of styrene/ethylene. These types of transformations are unknown and the products formed were confirmed using their spectral/analytical data. In addition, the structures of compounds 5e and 5n were confirmed by single-crystal X-ray analysis. Control experiments were conducted to support the proposed reaction mechanism.
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