作者:Barry Lygo、Mohamed Bhatia、Jason W.B. Cooke、David J. Hirst
DOI:10.1016/s0040-4039(03)00288-0
日期:2003.3
In this paper we report the development of a stereoselective IMDA approach to the phytotoxic polyketides (+/-)-solanapyrones A and B. The stereoselectivity of the key IMDA cycloaddition was optimized by investigating a range of 2,8,10-dodecatrienoic acid derivatives. This established that use of the Weinreb amide led to the desired exo-selectivity and also facilitated construction of the pyrone moiety. A novel approach to the installation of the C-3 formyl group in solanapyrone A is also described. (C) 2003 Elsevier Science Ltd. All rights reserved.
IMDA Reactions of β,δ-Diketoester-Substituted 1,7,9-Undecatrienes: Application in the Formal Synthesis of Solanapyrone D
作者:Barry Lygo、David J. Hirst
DOI:10.1055/s-2005-918445
日期:——
In this paper we describe the synthesis of β,δ-diketoester substituted 1,7,9-undecatrienes and their intramolecular Diels-Alder (IMDA) cycloadditions under thermal and acid-catalysed conditions. Application of this chemistry in the synthesis of a solanapyrone D precursor is reported.