Selective Synthesis of Polysubstituted Dihydroquinolines and α,β-Unsaturated Amidines by a Catalytic Reaction of Ynamides with Ketimines
作者:Kiyosei Takasu、Yuusuke Kuroda、Naoya Shindoh、Yoshiji Takemoto
DOI:10.1055/s-0033-1339191
日期:——
amidines. Ynamides reacted with benzophenone imines in the presence of triflic imide as a catalyst. Ynamides bearing a sulfonamide moiety gave the corresponding 2-amino-3,4-dihydroquinolines selectively in good to high yields. In contrast, yne-carbamates gave the corresponding α,β-unsaturated amidines exclusively. These methods permit simple preparation of sterically crowded polysubstituted quinolines and
摘要 在三氟甲酰亚胺作为催化剂的存在下,酰胺与二苯甲酮亚胺反应。带有磺酰胺部分的酰胺选择性地以高产率至高产率产生了相应的2-氨基-3,4-二氢喹啉。相反,炔基氨基甲酸酯仅给出相应的α,β-不饱和am。这些方法允许简单地制备空间上拥挤的多取代喹啉和α,β-不饱和am。 在三氟甲酰亚胺作为催化剂的存在下,酰胺与二苯甲酮亚胺反应。带有磺酰胺部分的酰胺选择性地以高产率至高产率产生了相应的2-氨基-3,4-二氢喹啉。相反,炔基氨基甲酸酯仅给出相应的α,β-不饱和am。这些方法允许简单地制备空间上拥挤的多取代喹啉和α,β-不饱和am。