1-Fluoroalkyl-prop-2-yne 1-imines and 1-iminium salts as building blocks: A new synthesis of α-(trifluoromethyl)pyrroles
作者:Thomas Schneider、Bianca Seitz、Maximilian Schiwek、Gerhard Maas
DOI:10.1016/j.jfluchem.2020.109567
日期:2020.7
induced cyclization of so-formed (3-aminoallenyl)phosphonium salts. While the mentioned alkynyl trifluoromethyl N-methyl-ketimines were obtained by copper-catalyzed cross-coupling of terminal alkynes and N-methyl-2,2,2-trifluoroacetimidoyl chloride, terminal alkynes and N-benzyl-2,2,2-trifluoroacetimidoyl chloride under the same reaction conditions furnished 2,3-disubstituted 5-CF3-pyrroles directly
1氟烷基-丙-2-炔-1- Ñ,Ñ -dimethyliminium通过三氟甲磺酸酯,得到盐Ñ炔氟代-methylation Ñ -methylketimines。它们代表新颖的,由于氟代烷基的活化作用,是高反应性的炔属亚胺盐类。本文中,我们描述的CF的两步转换3取代的亚铵盐为1,4-二取代α-CF 3个-pyrroles通过迈克尔加成三苯基膦的和如此形成的(3- aminoallenyl)鏻盐的热诱导的环化。所述炔基三氟甲基N-甲基酮亚胺是通过末端炔烃和N的铜催化交叉偶联而获得的。-甲基-2,2,2-三氟乙酰亚胺基氯,末端炔烃和N-苄基-2,2,2-三氟乙酰亚胺基氯在相同的反应条件下直接提供2,3-二取代的5-CF 3-吡咯。