An efficient synthesis of phenanthro-fused thiazoles by a non-phenolic oxidative coupling procedure of 4,5-diarylthiazoles
摘要:
A concise synthesis of the title compounds 6 is accomplished in high overall yield in a two step process starting from bromoketone 4. A thiazole ring formation and a non-phenolic oxidative coupling reaction using PIFA are features of me described synthesis. An exploration of the electronic requirements and the regioselectivity of the cyclization is also presented. (C) 1999 Elsevier Science Ltd. All rights reserved.