Two approaches to optically active 2-substituted chroman-4-ones are describ
ed. The first utilized the oxidation of a preformed chroman ring and the se
cond an intramolecular Mitsunobu cyclization. The methodology was applied t
o the synthesis of the biologically active natural product (-)-pinostrobin
(18). (C) 2001 Elsevier Science Ltd. All rights reserved.