H 2 O 2 -Na 2 WO 4体系在相转移催化下通过不饱和(甲基)丙烯酸酯的选择性环氧化合成环氧(甲基)丙烯酸酯。
摘要:
研究了各种经典的环氧化剂对不饱和(甲基)丙烯酸酯的选择性环氧化。结果表明,在相转移催化下,通过使用H 2 O 2(20%)-Na 2 WO 4体系可以得到高选择性和高收率。在这些条件下,严格控制温度和初始pH值可防止在这些选择性环氧化过程中发生聚合。结果表明,环氧化的选择性取决于两个双键亲核性的差异。
Hyperbranched Macromolecules via Olefin Metathesis
摘要:
A facile route to hyperbranched polymers via acyclic diene metathesis is reported. Any molecule functionalized with two or more acrylate groups and one terminal olefin can serve as an AB, monomer when exposed to an imidazolinylidene-based ruthenium olefin metathesis catalyst, due to the cross metathesis selectivity of this catalyst. For the polymers obtained by this method, both H-1 NMR spectroscopy and triple detector size exclusion chromatography conclusively indicate a branched architecture.
Preparation of Organosilicon Compound Having (Meth)acryloyloxy Group
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US20210139515A1
公开(公告)日:2021-05-13
A (meth)acryloyloxy-containing organosilicon compound (3) is prepared by simultaneously feeding a hydrohalosilane compound (1) and a (meth)acrylate compound (2) in the presence of a polymerization inhibitor to a reaction system, and effecting hydrosilylation reaction in the presence of a platinum catalyst. The content of (meth)acrylate compound (2) is 0-100 mol % based on the content of organosilicon compound (3) in the reaction system. R is a C
1
-C
10
monovalent hydrocarbon group, X is halogen, n is 1, 2 or 3, R
2
is H or methyl, and R
3
is a C
1
-C
18
alkylene group.
An electrochemical alkene azidocyanation reaction that is compatible with both alkyl and aryl alkenes was developed. The reactions involving aryl alkenes could be obtained with good enantioselectivities by employing a chiral ligand. Notably, this method of alkene difunctionalization employs readily accessible reagents and is distinguished by its demonstrated functional group tolerance.
Chiral Cp<sup>x</sup>Rhodium(III)‐Catalyzed Enantioselective Aziridination of Unactivated Terminal Alkenes
作者:Juanjuan Wang、Mu‐Peng Luo、Yi‐Jie Gu、Yu‐Ying Liu、Qin Yin、Shou‐Guo Wang
DOI:10.1002/anie.202400502
日期:2024.3.18
A chiral cyclopentadienyl-rhodium(III) catalyzedhighly enantioselective aziridination of challenging unactivatedterminalalkenes and N-pivalolyloxy sulfonamides has been developed. This catalytic system demonstrated outstanding catalytic activity and broad functional group tolerance, yielding synthetically important and highly valuable chiral aziridines with good to excellent yields and enantioselectivities
Ink composition, ink jet recording method, method for producing planographic printing plate, and planographic printing plate
申请人:FUJIFILM Corporation
公开号:EP2169020A1
公开(公告)日:2010-03-31
The invention provides an ink composition comprising a polymerization initiator, a (meth)acrylate having a double bond with a carbon atom having an sp3 hybrid orbital at an α position, and a colorant; an ink jet recording method using the ink composition; a planographic printing plate obtained by using the ink composition; and a method for producing the planographic printing plate.
PREPARATION OF ORGANOSILICON COMPOUND HAVING (METH)ACRYLOYLOXY GROUP
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP3819301A1
公开(公告)日:2021-05-12
A (meth)acryloyloxy-containing organosilicon compound (3) is prepared by simultaneously feeding a hydrohalosilane compound (1) and a (meth)acrylate compound (2) in the presence of a polymerization inhibitor to a reaction system, and effecting hydrosilylation reaction in the presence of a platinum catalyst. The content of (meth)acrylate compound (2) is 0-100 mol% based on the content of organosilicon compound (3) in the reaction system. R1 is a C1-C10 monovalent hydrocarbon group, X is halogen, n is 1, 2 or 3, R2 is H or methyl, and R3 is a C1-C18 alkylene group.