Chemoenzymatic synthesis of β-hydroxyl-sulfoxides by a two-step reaction of enzymatic reduction using Pseudomonas monteilii species and sulfoxidation with chiral titanium complexe
作者:Baodong Cui、Min Yang、Jing Shan、Lei Qin、Ziyan Liu、Nanwei Wan、Wenyong Han、Yongzheng Chen
DOI:10.1016/j.tet.2017.07.014
日期:2017.8
A two-step enantioselective synthetic strategy for the preparation of β-hydroxyl-sulfoxides has been described. With the enzymatic reduction of β-ketosulfides using Pseudomonas monteilii ZMU-T04 followed by the asymmetric sulfoxidation with Ti(OiPr)4/(S)-BINOL complexe, a wide range of corresponding β-hydroxyl-sulfoxide derivatives were smoothly obtained with excellent stereoselectivities (up to 99:1
已经描述了用于制备β-羟基亚砜的两步对映体选择性合成策略。通过使用Montesii monteilii ZMU-T04酶促还原β-酮硫醚,然后用Ti(O i Pr)4 /(S)-BINOL络合物进行不对称硫氧化,可以顺利地获得各种相应的β-羟基-亚砜衍生物。出色的立体选择性(高达99:1 dr和> 99%ee)。在控制实验的基础上,还提出了在β-羟基硫醚不对称硫氧化反应中,钛配合物可能存在的螯合物结构。