Copper(II)-mediated intermolecular amination of inert C(sp3)H bonds with simple alkylamines to construct α,α-disubstituted β-amino acid derivatives
作者:Chunxia Wang、Yudong Yang
DOI:10.1016/j.tetlet.2017.01.079
日期:2017.3
Disclosed herein is a copper(II)-mediated chelation-assisted intermolecular amination of inert C(sp3)H bonds using simple alkylamines as the amino source. A straightforward and step-economic alternative to α,α-disubstituted β-amino acid derivatives is provided consequently. This reaction features good functional group tolerance and relatively broad substrate scope. Furthermore, a coupling product between
Nickel-Catalyzed Aminoxylation of Inert Aliphatic C(sp<sup>3</sup>)–H Bonds with Stable Nitroxyl Radicals under Air: One-Pot Route to α-Formyl Acid Derivatives
作者:Chunxia Wang、Luoqiang Zhang、Jingsong You
DOI:10.1021/acs.orglett.7b00479
日期:2017.4.7
Nickel-catalyzed aminoxylation of an unactivated C(sp3)–H bond with a stable nitroxyl radical has been accomplished for the first time to offer various N-alkoxyamine derivatives, which further enables a one-pot approach to α-formyl acid derivatives. The aminoxylation process reported also provides direct evidence for the oxidative addition of a cyclometallic intermediate with a free radical, which
Nickel-Catalyzed Site-Selective Alkylation of Unactivated C(sp<sup>3</sup>)–H Bonds
作者:Xuesong Wu、Yan Zhao、Haibo Ge
DOI:10.1021/ja413131m
日期:2014.2.5
The direct alkylation of unactivated sp(3) C-H bonds of aliphatic amides was achieved via nickel catalysis with the assist of a bidentate directing group. The reaction favors the C-H bonds of methyl groups over the methylene C-H bonds and tolerates various functional groups. Moreover, this reaction shows a predominant preference for sp(3) C-H bonds of methyl groups via a five-membered ring intermediate
CELLULOSE DERIVATIVE AND PROCESS FOR PRODUCTION THEREOF, CELLULOSE RESIN COMPOSITION, MOLDED ARTICLE AND METHOD FOR PRODUCTION THEREOF, AND HOUSING FOR ELECTROCHEMICAL DEVICE
申请人:FUJIFILM Corporation
公开号:EP2295470A1
公开(公告)日:2011-03-16
A cellulose derivative having good thermal plasticity, strength, heat resistance and mold working suitability is provided.
The cellulose derivative is a cellulose derivative obtained from cellulose by substitution of hydrocarbyl groups ranging in carbon number from 1 to 7 and aliphatic acyl groups ranging in carbon number from 4 to 11 for at least part of the hydrogen atoms of hydroxyl groups contained in the cellulose.
CELLULOSE DERIVATIVE, RESIN COMPOSITION, MOLDED ARTICLE AND PROCESS FOR PRODUCTION THEREOF, AND HOUSING FOR ELECTRIC AND ELECTRONIC DEVICE
申请人:FUJIFILM Corporation
公开号:EP2465874A1
公开(公告)日:2012-06-20
A cellulose derivative, contains A) a hydrocarbon group; B) a group containing an acyl group: -CO-RB and an ethyleneoxy group: -C2H4-O- (RB represents a hydrocarbon group); and C) an acyl group: -CO-RC (RC represents a hydrocarbon group).
纤维素衍生物,包含 A) 一个烃基;B) 一个含有酰基:-CO-RB 和乙烯氧基:-C2H4-O-(RB 代表一个烃基)的基团;以及 C) 一个酰基:-CO-RC(RC 代表一个烃基)。