Catalytic asymmetric CO<sub>2</sub> utilization reaction for the enantioselective synthesis of chiral 2-oxazolidinones
作者:Ryuichi Nishiyori、Taiki Mori、Seiji Shirakawa
DOI:10.1039/d3ob00555k
日期:——
asymmetric bromocyclizations of in situgenerated carbamic acids from CO2 and allylamines were achieved via the use of a BINOL-derived chiral bifunctional selenide catalyst bearing a hydroxy group. Chiral 2-oxazolidinone products as important pharmaceutical building blocks were obtained with good enantioselectivities by the present catalytic asymmetric CO2 utilization reactions.
通过使用带有羟基的 BINOL 衍生的手性双功能硒化物催化剂,实现了由 CO 2和烯丙胺原位生成的氨基甲酸的催化不对称溴化环化。通过本催化不对称CO 2利用反应获得了具有良好对映选择性的手性2-恶唑烷酮产物作为重要的药物结构单元。
Oxazolidinone Synthesis through Halohydrin Dehalogenase- Catalyzed Dynamic Kinetic Resolution
作者:Ana Mikleušević、Zdenko Hameršak、Branka Salopek-Sondi、Lixia Tang、Dick B. Janssen、Maja Majerić Elenkov
DOI:10.1002/adsc.201500111
日期:2015.5.26
An efficient dynamickineticresolution protocol using a single enzyme is described. Both the kineticresolution and substrate racemization are catalyzed by halohydrin dehalogenase from Agrobacterium radiobacter AD1 (HheC). The HheC‐catalyzed reaction of epibromohydrin and 2‐bromomethyl‐2‐methyloxirane with sodium cyanate afforded 5‐substituted 2‐oxazolidinones in high yields (97% and 87%) and high