Oxazoline chemistry part III. Synthesis and characterisation of [2-(2′-anilinyl)-2-oxazolines] and some related compounds
作者:Karen M. Button、Robert A. Gossage
DOI:10.1002/jhet.5570400316
日期:2003.5
The syntheses and characterisation of a series of chiral and achiral 2-(aminophenyl)-2-oxazolines and some related compounds is reported. All of the derivatives have been produced by a one-step procedure involving the treatment of isatoic anhydride (i.e. [2H]-3, 1-benzoxazine-[1H-2,4-dione: 1) or its 5-chloro analogue with a slight excess of appropriate amino-alcohols. In most cases, anhydrous ZnCl2
报道了一系列手性和非手性2-(氨基苯基)-2-恶唑啉及一些相关化合物的合成与表征。所有衍生物均是通过一步法生产的,其中涉及对等酸酐的处理(即[2 H ] -3、1-苯并恶嗪-[1 H -2,4-二酮:1 ]或其5-氯类似物并略有过量的适当氨基醇。在大多数情况下,在高沸点芳烃溶剂(PhCl或PhMe)中,在回流温度下,无水ZnCl 2被证明是该反应的有效路易斯酸催化剂。使用rac -2-氨基-1-丁醇,(S)-苯基甘醇,2-甲基-2-氨基-1-丙醇和(1S,2R)或(1R,2S) -顺式- 1 -氨基-2-茚满醇; 收率从85%到22%。使用氨基醇,例如2-乙醇胺,(±)-2-氨基-1-苯基-1-丙醇或3-氨基-1-丙醇(得到相应的4,5-二氢-1,3-恶嗪)导致产量不佳。使用其他路易斯酸催化剂(硅酸,Cd(acac)2 ·2H 2 O,CuCl 2 ·2H 2 O,InCl 3)或更高的温