Syntheses of sugar-derived heterotricyclic lactams
Abstract
Following stereoselective addition of N-iodosuccinimide towards glycals and subsequent dehalogenation, glycosylimides 1 and 2 are obtained and converted by irradiation to yield the azepindione derivatives 3 and 4 and the [5.3.1.02,6] tricyclic alcohols 5 and 6; their prolonged irradiation gives highly functionalised bridged heterotricyclic lactams 10 and 11 with a cyclopentane backbone.