Iron-Catalyzed Hydroboration of Vinylcyclopropanes
作者:Chenhui Chen、Xuzhong Shen、Jianhui Chen、Xin Hong、Zhan Lu
DOI:10.1021/acs.orglett.7b02691
日期:2017.10.6
An iron-catalyzed hydroboration of vinylcyclopropane with HBpin is first reported for the preparation of valuable homoallylic organoboronic esters. The iron catalysts enable efficient and regioselective C–C cleavage of vinylcyclopropanes, stereoselectively delivering E-alkenes with good stereospecific selectivity at an allylic position. This protocol exhibits mild conditions with good functional group
Intermolecular asymmetric cyclopropanation with diazoketones catalyzed by chiral ruthenium porphyrins
作者:Irène Nicolas、Paul Le Maux、Gérard Simonneaux
DOI:10.1016/j.tetlet.2008.01.129
日期:2008.3
The asymmetric addition of diazoacetophenone to styrene derivatives to give optically active cyclopropyl ketones (ee up to 86%) was carried out by using chiral ruthenium porphyrins as homogeneous catalysts.
Asymmetric intermolecular cyclopropanation of alkenes by diazoketones catalyzed by Halterman iron porphyrins
作者:Irène Nicolas、Thierry Roisnel、Paul Le Maux、Gérard Simonneaux
DOI:10.1016/j.tetlet.2009.06.131
日期:2009.9
The asymmetric addition of diazoacetophenone to styrene derivatives to give optically active cyclopropyl ketones (ee up to 80%) was carried out rising chiral iron porphyrins as homogeneous catalysts. Intermolecular N-H functionalization of anilines by means of carbenoid-induced N-H insertion was also possible but without enantioselectivity. (C) 2009 Elsevier Ltd. All rights reserved.