Synthesis of Enantiopure 1-Arylprop-2-en-1-ols and Their tert-Butyl Carbonates
摘要:
Enantiomerically pure 1-arylpropenols 8 have been prepared by resolution of the corresponding racemates, using the lipase formulation Novozyme 435. Deprotonation of the latter alcohols with n-BuLi, followed by derivatization with (t-BUO)(2)CO, afforded the corresponding carbonates 5. Optimization of the process is presented.
Synthesis of Enantiopure 1-Arylprop-2-en-1-ols and Their tert-Butyl Carbonates
摘要:
Enantiomerically pure 1-arylpropenols 8 have been prepared by resolution of the corresponding racemates, using the lipase formulation Novozyme 435. Deprotonation of the latter alcohols with n-BuLi, followed by derivatization with (t-BUO)(2)CO, afforded the corresponding carbonates 5. Optimization of the process is presented.
Highly diastereo- and enantio-selective epoxidation of secondary allylic alcohols catalyzed by styrene monooxygenase
作者:Hui Lin、Yan Liu、Zhong-Liu Wu
DOI:10.1039/c0cc04360e
日期:——
Enantiomerically enriched glycidol derivatives with contiguous stereogenic centers were obtained in a highly diastereo- and enantio-selective epoxidation catalyzed with the styrene monooxygenase StyAB2.
作者:Stefania F. Musolino、O. Stephen Ojo、Nicholas J. Westwood、James E. Taylor、Andrew D. Smith
DOI:10.1002/chem.201604788
日期:2016.12.23
The non‐enzymatic acylative kineticresolution of challenging aryl–alkenyl (sp2 vs. sp2) substituted secondaryalcohols is described, with effective enantiodiscrimination achieved using the isothiourea organocatalyst HyperBTM (1 mol %) and isobutyric anhydride. The kineticresolution of a wide range of aryl–alkenyl substituted alcohols has been evaluated, with either electron‐rich or naphthyl aryl
描述了具有挑战性的芳基-烯基(sp 2与 sp 2 )取代的仲醇的非酶酰化动力学拆分,并使用异硫脲有机催化剂 HyperBTM(1 mol%)和异丁酸酐实现了有效的对映区分。已经评估了各种芳基-烯基取代醇的动力学拆分,其中富电子或萘基芳基取代基与未取代的乙烯基取代基相结合,提供了最高的选择性( S =2-1980)。演示了使用该方案对模型芳基-乙烯基(sp 2与 sp 2 )取代的仲醇进行克级(2.5 g)动力学拆分,可获取每种产物对映体的 >1 g 99:1呃。
A new monooxygenase from <i>Herbaspirillum huttiense</i> catalyzed highly enantioselective epoxidation of allylbenzenes and allylic alcohols
epoxidation could also achieve the kinetic resolution of racemic secondary allylicalcohols, yielding the corresponding epoxides with up to 50% yields, as well as excellent enantio- and diastereoselectivity (up to >99% ee and >99% de) within 20–60 min, making a greener strategy for the production of valuable enantiopure glycidol derivatives in the fine chemical and pharmaceutical industries.
Synthesis of Enantiopure 1-Arylprop-2-en-1-ols and Their <i>tert</i>-Butyl Carbonates
作者:Jan Štambaský、Andrei V. Malkov、Pavel Kočovský
DOI:10.1021/jo801874r
日期:2008.11.21
Enantiomerically pure 1-arylpropenols 8 have been prepared by resolution of the corresponding racemates, using the lipase formulation Novozyme 435. Deprotonation of the latter alcohols with n-BuLi, followed by derivatization with (t-BUO)(2)CO, afforded the corresponding carbonates 5. Optimization of the process is presented.