BINOL-Al catalyzed kinetic resolution of citronellal analogues: synthesis of a variety of fragrances
作者:Hisanori Itoh、Hironori Maeda、Shinya Yamada、Yoji Hori、Takashi Mino、Masami Sakamoto
DOI:10.1016/j.tetasy.2016.06.007
日期:2016.8
A chiral aluminum catalyst was used for the kinetic resolution of citronellal analogues. Racemic 3-alkyl-citronellals gave optically active 5-alkylisopulegols with high enantioselectivity. Unreacted 3-alkyl-citronellal analogues were obtained with low enantioselectivity. The two main diastereoisomers of the product were opposite to each other. The scents of 5-substituted isopulegols were evaluated. The chiral recognition of the catalysts and their effects on the kinetic resolutions are also discussed. (C) 2016 Elsevier Ltd. All rights reserved.