A short enantioselective synthesis of a component of cryptophycin A and arenastatin A
摘要:
Synthesis of 1, a component of cryptophycin A 2 and arenastatin A 3, was achieved by applying palladium-catalyzed reductive ring opening of optically active alkenyl oxirane 13 for the construction of the vicinal stereogenic centers. (C) 1998 Elsevier Science Ltd. All rights reserved.
A short enantioselective synthesis of a component of cryptophycin A and arenastatin A
摘要:
Synthesis of 1, a component of cryptophycin A 2 and arenastatin A 3, was achieved by applying palladium-catalyzed reductive ring opening of optically active alkenyl oxirane 13 for the construction of the vicinal stereogenic centers. (C) 1998 Elsevier Science Ltd. All rights reserved.
Synthesis of chiral 4-hydroxy-2,3-unsaturated carbonyl compounds from 3,4-epoxy alcohols by oxidation: application in the formal synthesis of macrosphelide A
作者:Tushar K Chakraborty、Subhas Purkait、Sanjib Das
DOI:10.1016/j.tet.2003.09.070
日期:2003.11
An interesting transformation during the oxidation of 3,4-epoxy alcohols 1a-d, derived from the corresponding homoallylic alcohols, led to the formation of 4-hydroxy-2,3-unsaturated carbonyls 2a-d in very good yields. One of these products 2c was transformed into the functionalised carboxylic acid 5, an advanced stage intermediate from which the total synthesis of macrosphelide A has been reported. (C) 2003 Elsevier Ltd. All rights reserved.