Preparation of 3-hydroxyoxindoles with dimethyldioxirane and their use for the synthesis of natural products
摘要:
This work describes a general protocol for the oxidation of indole and oxindole derivatives with dimethyldioxirane to give 3-hydroxyoxindoles present in many natural products. This strategy allowed us to synthesize the natural product 1, to carry out the first total synthesis of 4, a formal total synthesis of donaxaridine (5) and to achieve the synthesis of pyrroloindoline 8, a debromo analogue of the natural product flustraminol B (7). (c) 2006 Elsevier Ltd. All rights reserved.