The one-pot synthesis of azide-substituted dihydropyrazoles in isopropanol was performed by using chalcones, hydrazine hydrate, and an acyl chloride at 0 ℃. Subsequent Staudinger–aza-Wittig–dehydroaromatization reactions of the products with methyl(diphenyl)phosphine were also investigated for further application in the construction of pyrazolo[1,5-c]quinazolines.

中文翻译：

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通过施陶丁格-Aza-Wittig-脱氢芳构化序列合成吡唑并[1,5-c]喹唑啉的有效方案

以查耳酮、水合肼和酰氯为原料，在0 ℃下在异丙醇中一锅法合成叠氮化物取代的二氢吡唑类化合物。还研究了产物与甲基（二苯基）膦的后续 Staudinger-aza-Wittig-脱氢芳构化反应，以进一步应用于构建吡唑并 [1,5-c] 喹唑啉。