Synthesis of enantiopure C<sub>3</sub>- and C<sub>4</sub>-hydroxyretinals and their enzymatic reduction by ADH8 from Xenopus laevis
作者:Marta Domínguez、Rosana Álvarez、Emma Borràs、Jaume Farrés、Xavier Parés、Angel R. de Lera
DOI:10.1039/b514273c
日期:——
(R)-all-trans-3-hydroxyretinal 1, (S)-all-trans-4-hydroxyretinal 3 and (R)-all-trans-4-hydroxyretinal 5 have been synthesized stereoselectively by Horner–Wadsworth–Emmons and Stille cross-coupling as bond-forming reactions. The CBS method of ketone reduction was used in the enantioface-differentiation step to provide the precursors for the synthesis of the 4-hydroxyretinal enantiomers. The kinetic constants of Xenopus laevis ADH8 with these retinoids have been determined.
(R)-全反式-3-羟基视黄醛 1、(S)-全反式-4-羟基视黄醛 3 和(R)-全反式-4-羟基视黄醛 5 是通过 Horner-Wadsworth-Emmons 和 Stille 交叉偶联作为成键反应立体选择性合成的。在对映体分离步骤中采用了 CBS 酮还原法,为 4-羟基视黄醛对映体的合成提供了前体。已测定了爪蟾 ADH8 与这些视黄酸的动力学常数。