Non-canonical regioisomerizations and a ‘Diels–Alderase’ are likely essential in the biosynthesis of Spiculoic acid A
作者:Atahualpa Pinto、Christopher N. Boddy
DOI:10.1016/j.bmcl.2012.06.052
日期:2012.8
The regiochemistry of dehydration and cyclization steps of the linear biosynthetic precursor of the polyketide natural product Spiculoic acid A (1) were examined. Herein we describe the synthesis of polyene-containing aldehyde 21, a counterpart to the metabolite's putative polyketide intermediate and demonstrate its inability to undergo facile IMDA chemistry. These results suggest the involvement of a non-canonical regioisomerization in the biosynthesis of 1, and that the IMDA reaction is likely enzyme-catalyzed. (c) 2012 Elsevier Ltd. All rights reserved.