A simple and efficient method for Cp*CoIII-catalyzed C–H bond alkylation using activated olefins was developed. Selective C–H monoalkylation was performed at ambient temperature. One-pot symmetrical dialkylation and sequential unsymmetrical C–H dialkylation were performed to give the desired products in excellent yields. The reaction was found to proceed through an M–alkyl intermediate after migratory
开发了一种使用活化烯烃进行Cp * Co III催化的C–H键烷基化的简单有效的方法。选择性C–H单烷基化反应是在环境温度下进行的。一锅对称二烷基化和连续不对称CH二烷基化反应以优异的收率得到了所需的产物。发现该反应在迁移插入后通过M-烷基中间体进行,并且该中间体进行原金属脱金属反应,以产生预期的烷基化产物以及再生的催化剂。
Palladium-Catalyzed C–H Monoalkoxylation of α,β-Unsaturated Carbonyl Compounds
An efficient method for the direct introduction of alkoxy groups into the β-position of alkene moieties of various α,β-unsaturatedcarbonylcompounds through the palladium-catalyzed C(sp2)–H monoalkoxylation using alcohols in the presence of sodium nitrite was developed; the corresponding enol ethers were selectively synthesized with minimal generation of acetals.
Chemoselective Transesterification of Acrylate Derivatives for Functionalized Monomer Synthesis Using a Hard Zinc Alkoxide Generation Strategy
作者:Daiki Nakatake、Ryo Yazaki、Takashi Ohshima
DOI:10.1002/ejoc.201600737
日期:2016.8
functionalized acrylate derivatives with the view to prepare functional polymers was explored. Hard zincalkoxide generation enabled the highly chemoselective transesterification of acrylate derivatives over the undesired conjugate addition, which caused polymerization. The combined use of the catalytic zinc cluster Zn4(OCOCF3)6O and 4-(dimethylamino)pyridine delivered various functionalized acrylate derivatives
areas such as medicinal chemistry, fluorescence and materials science. Herein, we report the first transition metal-catalyzed functionalization of the mono-closo-decaborate cluster [1-CB9H10]− by regioselective B–H activation. Using terminal alkenes bearing a wide range of functional groups, dehydrogenative coupling under mild conditions leads to B2/3-dialkenylated products, as verified by X-ray crystallography
CURABLE COMPOSITION FOR IMPRINTS, PATTERNING METHOD AND PATTERN
申请人:Kodama Kunihiko
公开号:US20110236595A1
公开(公告)日:2011-09-29
Provided is a curable composition for imprints having good patternability and dry etching resistance. Disclosed is a curable composition for imprints comprising a polymerizable monomer (Ax) having a substituent having an aromatic group and having a molecular weight of 100 or more, and a photopolymerization initiator.