A Concise Asymmetric Synthesis of (2<i>S</i>,3<i>S</i>,7<i>S</i>)-3,7-Dimethylpentadecan-2-yl Acetate and Propionate, the Sex Pheromones of Pine Sawflies
7S)-3,7-Dimethylpentadecan-2-yl acetate (2) and its propionate analogue (3) are the main sex pheromones of all Neodiprion species and Diprion similes, respectively. Starting from (S)-malic acid and employing a highly chemo-, regio-, and stereoselective tandem ester reduction−epoxide formation−reductive epoxide-opening reaction protocol, an efficient total synthesis of (2S,3S,7S)-2 and -3 is reported
Stereochemistry of hydroxylation during the conversion of α-ketoisocaproate to β-hydroxyisovalerate by 4-hydroxyphenylpyruvate dioxygenase
作者:Robert M. Adlington、Jack E. Baldwin、Nicholas P. Croach、Meng-Huee Lee、Colin H. MacKinnon、Diana R. Paul
DOI:10.1016/s0960-894x(96)00489-1
日期:1996.11
4-Hydroxyphenylpyruvate dioxygenase catalyzes the oxidative decarboxylation and hydroxylation of alpha-ketoisocaproate 1 to beta-hydroxyisovalerate 2 with retention of configuration during the hydroxylation step (Scheme 1). Copyright (C) 1996 Elsevier Science Ltd