Copper-Catalyzed Stereospecific Hydroboration of Internal Allylic Alcohols
作者:Enhui Ji、Haiwen Meng、Yue Zheng、Velayudham Ramadoss、Yahui Wang
DOI:10.1002/ejoc.201901435
日期:2019.11.30
Copper‐catalyzed highly stereospecific hydroboration of internal allylic alcohols using a silyl ether transient protection strategy is reported. This in situ protection effectively avoids the preferential side reaction of free hydroxyl group with boron reagent, thus promoting hydroboration. This method provides both the anti‐ and the syn‐ diastereomers of 1,3‐diols in high level of diastereomeric ratios
A cascade reaction including reduction, isomerization, and dehydration provides E-selective or multi-substituted enones from bis-allyl alcohols treated with Crabtree's catalyst. This reaction proceeds smoothly at room temperature under a hydrogen atmosphere.
Asymmetric Hydrogenations of Acyclic α,β-Unsaturated Ketones with Chiral Frustrated Lewis Pairs (FLPs)
作者:Zaiqi Han、Xiangqing Feng、Haifeng Du
DOI:10.1021/acs.joc.3c02031
日期:2023.11.17
In this paper, we demonstrate a metal-free asymmetric hydrogenation of acyclic α,β-unsaturated ketones under the catalysis of a frustratedLewispair (FLP) comprising chiral oxazoline and achiral borane. A wide range of optically active α-substituted ketones were furnished in high yields with 26–85% ee’s.
在本文中,我们展示了在包含手性恶唑啉和非手性硼烷的受挫路易斯对(FLP)的催化下,无环α,β-不饱和酮的无金属不对称氢化。以高产率提供了多种光学活性 α-取代酮,其 ee 为 26-85%。
COMPOSITION FOR INHIBITING FEEDING OF WEEVILS
申请人:Forskarpatent I SYD
公开号:EP1294229A1
公开(公告)日:2003-03-26
[EN] COMPOSITION FOR INHIBITING FEEDING OF WEEVILS<br/>[FR] COMPOSITION POUR EMPECHER DES CHARANÇONS DE S'ALIMENTER
申请人:FORSKARPATENT I SYD
公开号:WO2002000022A1
公开(公告)日:2002-01-03
The present invention relates to a Composition containing a gnawing inhibiting compound and intended to be applied on conifer saplings, in particular pine saplings, to prevent weevil to attack the young stem, wherein the gnawing inhibiting compound is present in a bound form to a substance of the group of zeolites, cyclodextrines, homogenous porous microspheres, spherical vesicles, hollow fibres, such as textile fibres (wool) capillaries of synthetic material (polymers), starch, and polymer films, optionally in combination with a carrier, whereby the gnawing inhibiting compound is present in an amount of 1 to 10 % by weight, as well as gnawing inhibiting compounds.