Asymmetric Synthesis with the Enzyme <i>Coprinus</i> Peroxidase: Kinetic Resolution of Chiral Hydroperoxides and Enantioselective Sulfoxidation
作者:Waldemar Adam、Cordula Mock-Knoblauch、Chantu R. Saha-Möller
DOI:10.1021/jo990201p
日期:1999.6.1
hydroperoxide 1a afforded with CiP enantiomerically enriched hydroperoxide 1a (ee up to 54%) and alcohol 2a (ee up to 40%), as well as ketone 3a (which is also formed simultaneously in all other reactions) and molecular oxygen. Catalase activity was established for CiP with hydrogen peroxide. When aryl alkyl sulfides 4 were used as oxygen acceptors, three products, sulfoxides 5, alcohols 2, and hydroperoxides
Coprinus过氧化物酶(CiP)用于外消旋氢过氧化物1的动力学拆分和前手性硫化物4的不对称硫氧化。在动力学分辨率的条件下,CiP和愈创木酚作为还原剂还原了11种氢过氧化物1a-k,对映选择性最高> (S)-氢过氧化物1的98%和(R)-醇2的90%。在没有还原剂的情况下,氢过氧化物1a提供了CiP对映异构体富集的氢过氧化物1a(ee最高为54%)和醇2a( ee高达40%),酮3a(在所有其他反应中也同时形成)和分子氧。用过氧化氢确定了CiP的过氧化氢酶活性。将芳基烷基硫化物4用作氧受体时,得到三种产物:亚砜5,醇2和氢过氧化物1,全部以对映体富集的形式存在。衍生自萘基甲基硫化物(4f)的亚砜的最高ee值(89%)。因此,CiP可用于光学活性氢过氧化物1,醇2和亚砜5的不对称合成。