Synthesis of Multisubstituted Pyrroles from Enolizable Aldehydes and Primary Amines Promoted by Iodine
作者:Wenbo Huang、Shaomin Chen、Zhiyan Chen、Meie Yue、Minghao Li、Yanlong Gu
DOI:10.1021/acs.joc.9b00596
日期:2019.5.3
4-Trisubstituted pyrroles were synthesized from enolizable aliphatic aldehydes and primary aliphatic amines by using iodine as the dual Lewis acid/mild oxidant. In the presence of 3.0 equiv of TBHP, enolizable α,β-unsaturated aldehyde, for example, cocal reacted with aromatic primary amines to form C2-iodized N-arylpyrroles. An acetal-containing pyrrole was successfully prepared from 4-aminobutyraldehyde
以碘为路易斯酸/温和氧化剂,由可烯化的脂肪族醛和伯脂肪族胺合成了1,2,4-三取代的吡咯。在3.0当量的TBHP存在下,可烯化的α,β-不饱和醛,例如,与芳族伯胺发生共价反应,形成C 2-碘化的N-芳基吡咯。由4-氨基丁醛二乙基乙缩醛成功制备了含乙缩醛的吡咯,可以轻松地将其转化为5,6,7,8-四氢吲哚嗪衍生物。