Iodine-Promoted Synthesis of 1-Alkyl-3-aroylindolizines from<i>N</i>-(Aroylmethyl)pyridinium Salts and Aliphatic Aldehydes
作者:Chen Tan、Peiyun Yan、Weijian Ye、Juan Yao、Weiming Wu、Cunde Wang
DOI:10.1002/hc.21137
日期:2014.1
An effective and practical method has been developed for the diversity-oriented synthesis of 1-alkyl-3-aroylindolizines via the 1,3-dipolar cycloaddition of pyridinium ylides and aliphatic aldehydes in the presence of molecular iodine and a catalytic amount of MnO2. The synthesis proceeds by tandem reactions involving [3+2] cycloaddition, dehydration of the cycloadduct, and dehydroaromatization. Molecular
在分子碘和催化量的 MnO2 存在下,通过吡啶鎓叶立德和脂肪醛的 1,3-偶极环加成反应,开发了一种有效且实用的方法,用于多样化导向合成 1-烷基-3-芳基茚茚。该合成通过涉及 [3+2] 环加成、环加合物脱水和脱氢芳构化的串联反应进行。分子碘在反应中作为催化剂和脱氢芳构化试剂。