Umpolung Synthesis of 1,3-Amino Alcohols: Stereoselective Addition of 2-Azaallyl Anions to Epoxides
作者:Paige E. Daniel、Alexandria E. Weber、Steven J. Malcolmson
DOI:10.1021/acs.orglett.7b01471
日期:2017.7.7
report the direct preparation of 1,3-amino alcohols that contain up to three contiguous stereogenic centers by the umpolung coupling of imines and epoxides. Nucleophilic 2-azaallyl anions, generated from imines, are stereoselectively added to epoxides to furnish 1,3-amino alcohols after hydrolysis of the product imine. Transformations afford amino alcohols with >98% site selectivity with respect to
Process for the ruthenium-catalysed epoxidation of olefins by means of hydrogen peroxide
申请人:Magerlein Wolfgang
公开号:US20060161011A1
公开(公告)日:2006-07-20
The present invention relates to a process for the epoxidation of olefins using catalysts based on ruthenium complexes in the presence of hydrogen peroxide.
Dehydrogenation Based Asymmetric Epoxidation of Arylalkanes to Chiral Epoxides
作者:Yiting Su、Feng Yu、Guixia Liu、Zheng Huang
DOI:10.1002/cjoc.202200304
日期:2022.10
We report herein a formal asymmetricepoxidation of arylalkanes enabled by a one-pot dual-catalysts system comprising a pincer Ir catalyst for alkane dehydrogenation-alkene isomerization (AD-ISO) and a chiral ketone catalyst for asymmetric alkene epoxidation. This protocol provides a catalytic method for the synthesis of aryl epoxides in useful yields with high regio- and stereoselectivity directly
我们在此报道了一种通过一锅双催化剂系统实现的芳基烷烃的正式不对称环氧化,该系统包括用于烷烃脱氢-烯烃异构化 (AD-ISO) 的钳形 Ir 催化剂和用于不对称烯烃环氧化的手性酮催化剂。该协议提供了一种催化方法,用于直接从容易获得的烷基芳烃中合成具有高区域和立体选择性的有用产率的芳基环氧化物。环氧化产物的立体特异性衍生允许获得各种对映体富集的化合物。
Verfahren zur Ruthenium-katalysierten Epoxidierung von Olefinen mit Wasserstoffperoxid
申请人:LANXESS Deutschland GmbH
公开号:EP1683791A1
公开(公告)日:2006-07-26
Die vorliegende Erfindung betrifft ein Verfahren zur Epoxidierung von Olefinen mit Katalysatoren auf Basis von Rutheniumkomplexen in Gegenwart von Wasserstoffperoxid.