Promoter free allylation of trichloroacetimidates with allyltributylstannanes under thermal conditions to access the common 1,1′-diarylbutyl pharmacophore
作者:Nivedita S. Mahajani、John D. Chisholm
DOI:10.1039/c8ob00687c
日期:——
found in many biologically active small molecules. To access these systems under mild conditions, the reaction of diarylmethyl trichloroacetimidates with allyltributylstannanes was explored. Simply heating allyltributylstannane with the trichloroacetimidate resulted in substitution of the imidate with an allyl group. Unlike other methods used to access these systems, no strong base, transition metal catalyst
1,1'-二芳基丁基是在许多具有生物活性的小分子中发现的常见药效团。为了在温和的条件下进入这些系统,研究了二芳基甲基三氯乙酰亚胺酸酯与烯丙基三丁基锡的反应。简单地将烯丙基三丁基锡烷与三氯乙亚氨酸酯一起加热,导致亚丙酸酯被烯丙基取代。与用于访问这些系统的其他方法不同,不需要强碱,过渡金属催化剂,布朗斯台德酸或路易斯酸助催化剂即可影响转化。富含电子的苄基三氯乙酰亚胺酸酯系统的转化效果最好,只需将反应物在硝基甲烷中回流即可获得优异的收率。