A facile stereoselective synthesis of 2-perfluoroalkyl-3a,4,5,6-tetrahydroimidazo[1,5-b]isoxazoles
摘要:
Methyl 2-perfluoroalkynoates 2 reacted readily with cyclic nitrones 1 via 1,3-dipolar cycloaddition at room temperature to give 2-perfluoroalkyl-3a,4,5,6-tetrahydroimidazo[1,5-b]isoxazoles 3 in good to excellent yields with high diastereoselectivity and regioselectivity. (C) 2008 Elsevier B.V. All rights reserved.