“Fries like” rearrangement: A novel and efficient method for the synthesis of 6-acyl-2(3H)-benzoxazolones and 6-acyl-2(3H)-benzothiazolones
作者:Huseyin Ucar、Kim Van derpoorten、Paul Depovere、Daniel Lesieur、Majed Isa、Bernard Masereel、Jacques Delarge、Jacques H. Poupaert
DOI:10.1016/s0040-4020(97)10400-8
日期:1998.2
6-acyl-2(3H)-benzoxazolone and 6-acyl-2(3H)-benzothiazolone derivatives have particularly interesting anti-inflammatory, antiepileptic, analgesic and antiviral properties. In this study, we report an original method of acylation on the 6-position of 2(3H)-benzoxazolone and 2(3H)-benzothiazolone which consists in a two-step procedure involving migration of the acyl group from the N-position to the 6-position
Design and synthesis of 3-acyl-2(3H)-benzoxazolone and 3-acyl-2(3H)-benzothiazolone derivatives
作者:Faouzi Guenadil、Hocine Aichaoui、Coco N. Kapanda、Didier M. Lambert、Christopher R. McCurdy、Jacques H. Poupaert
DOI:10.1007/s00706-010-0419-9
日期:2011.1
“green” method using solid sodium hydroxide in a solvent mixture of acetone/water was found to catalyze N-acylation of 2(3H)-benzoxazolones and 2(3H)-benzothiazolones for facile and rapid synthesis of N-acyl derivatives in excellent yields. This method was applied to the synthesis of a series of 132 compounds employing a variety of acyl chlorides. Graphical abstract
Application of the "Fries Like" Rearrangement Using ZnCl 2 for the Synthesis of 6-Acyl-2(3H)-benzothiazolones
作者:Faouzi Guenadil、Hocine Aichaoui
DOI:10.1080/10426500307842
日期:2003.8.1
In this work we report another method of acylation on the 6-position of the 2(3H)-benzothiazolone ring with Fries-like rearrangement catalyzed by zinc chloride instead of aluminiumchloride and 3-acyl-2(3H)-benzothiazolones derivatives as starting materials. This method is advantagous in regard to other acylation methods as it requires only three equivalents of ZnCl 2 to produce 6-acyl-derivatives