Stereocontrolled synthesis of calyculin A: construction of the C(1)–C(14) tetraene nitrile unit
Abstract
An enantioselective and geometrically selective synthesis of the C(1)–C(14) tetraene nitrile unit of calyculin A, using aldol chemistry with (+)-(E)-diisopinocampheylborane and Stille coupling, is described.