Synthesis of androsteno[17,16-d]pyrazoles and androsteno[17,16-d]-2′-pyrazolines with pyrazolo[3,4-d]pyrimidine fragments
作者:A. V. Komkov、A. O. Chizhov、A. S. Shashkov、I. V. Zavarzin
DOI:10.1007/s11172-018-2185-5
日期:2018.6
upon melting undergo cyclization to androsteno[17,16-d]-2′-pyrazolines. Reflux of the hydrazone in mesitylene in the presence of MCPBA leads to a mixture of three products, namely, androsteno[17,16-d]-2′-pyrazoline, androsteno[17,16-d]pyrazole, and dodecahydro-13H-phenanthro[1′,2′:5,6]pyrano[2,3-d]pyrazole derivative resulting from the oxidative expansion of the steroid cyclopentane ring D.
研究了含吡唑并 [3,4-d] 嘧啶的肼与孕烯醇酮衍生物的反应。16α,17α-epoxy-3β-hydroxy-5-pregnen-20-one及其3-O-乙酰基衍生物与6-肼基-3,4-二甲基-1H-吡唑并[3,4-d]嘧啶的反应和 4-肼基-3-甲基-6-苯基-1H-吡唑并[3,4-d]嘧啶得到新的雄烯并[17,16-d]吡唑和吡唑并[3,4-d]嘧啶片段。3β-羟基孕-5,16-二烯-20-酮及其3-O-乙酰基衍生物与4-肼基-3-甲基-6-苯基-1H-吡唑并[3,4-d]嘧啶反应生成腙在孕烯醇酮分子的 20 位,熔化后环化成雄甾烯 [17,16-d]-2'-吡唑啉。在 MCPBA 存在下,腙在均三甲苯中的回流导致三种产物的混合物,即雄烯[17,16-d]-2'-吡唑啉、雄烯[17,16-d]吡唑、