The Journal of organic chemistry

Thermolysis of benzannulated enyne-carbodiimides. Application in the synthesis of pyrido [1', 2': 1, 2] pyrimido [4, 5-b] indoles and related heteroaromatic compounds

X Lu, JL Petersen, KK Wang

Index: Lu, Xiaoling; Petersen, Jeffrey L.; Wang, Kung K. Journal of Organic Chemistry, 2002 , vol. 67, # 22 p. 7797 - 7801

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Citation Number: 29

Abstract

Several derivatives of the pyrido [1', 2': 1, 2] pyrimido [4, 5-b] indoles 4 and the pyrazino [1', 2': 1, 2] pyrimido [4, 5-b] indoles 14 were synthesized by treatment of the benzannulated enyne-isocyanates 8 with the iminophosphoranes 9 and 13, respectively, for the aza-Wittig reaction followed by thermolysis. The reaction presumably proceeds through an initial formation of the corresponding benzannulated enyne-carbodiimides, such as 10, followed ...