Organocatalytic α-hydroxymethylation of cyclopentanone with aqueous formaldehyde: Easy access to chiral δ-lactones
作者:Nobuyuki Mase、Azusa Inoue、Masaki Nishio、Kunihiko Takabe
DOI:10.1016/j.bmcl.2009.03.012
日期:2009.7
Optically active lactones are important synthons in perfume and aroma manufacturing. Therefore, developments of efficient asymmetric syntheses are desired. Organocatalytic asymmetric alpha-hydroxymethylations of cyclopentanone with aqueous formaldehyde have been developed, to furnish the corresponding alpha-(hydroxymethyl) cyclopentanone with high enantioselectivity. Further chemical transformation of alpha-(hydroxymethyl) cyclopentanone gave the key intermediate for jasmine lactone, which is widely found in fruits and flowers. (C) 2009 Elsevier Ltd. All rights reserved.