120801-40-3Relevant academic research and scientific papers
Heterocycles by Cycloaddition. Part 8. Preparation of Benzopyranopyrroles by Intramolecular Cycloaddition-Extrusion of Mesoionic Oxazolium-5-olates
Kato, Hiroshi,Wang, Shu-Zhong,Nakano, Hirofumi
, p. 361 - 363 (2007/10/02)
The in situ intramolecular cycloaddition-extrusion of the 2-oxazolium-5-olates (4), prepared by cyclisation of the N-acylamino acids (3), gave the benzopyranopyrroles (6a-c) in good yields.Also the 2-acetylated product
