Dichloromethane as a Chlorination Reagent for α-Bromocarbonyl Compounds in the Presence of a Copper Catalyst
作者:Kentaro Takeuchi、Syo Ishida、Takashi Nishikata
DOI:10.1246/cl.170062
日期:2017.5.5
We found that dichloromethane is a powerful chlorinatingreagent for the congested 3° and 2° Csp3–Br bond of α-bromocarbonyl amides, esters, and ketones. In the presence of an appropriate copper complex as a catalyst, the desired chlorination occurred within an hour. Control experiments revealed that in situ-generated CuCl2 is a key chlorinating agent that reacts with the 3° or 2° alkyl radicals generated
Methacrylic esters, represented by methyl methacrylate (MMA), are widely used as commodity chemicals. Here, the one-potsynthesis of methacrylic esters from acetone, a haloform and alcohols in the presence of an organic base is described. Using DBU as the organic base for the reaction of acetone, chloroform and methanol in acetonitrile afforded MMA in 66 % yield. When the solvent was replaced by benzonitrile
Organic Bismuth Compound, Method for Producing Same, Living Radical Polymerization Initiator, Method for Producing Polymer Using Same, and Polymer
申请人:Yamago Shigeru
公开号:US20070265404A1
公开(公告)日:2007-11-15
An organobismuth compound represented by the formula (1)
wherein R
1
and R
2
are C
1
-C
8
alkyl, aryl, substituted aryl or an aromatic heterocyclic group, R
3
and R
4
are each a hydrogen atom or C
1
-C
8
alkyl, and R
5
is aryl, substituted aryl, an aromatic heterocyclic group, acyl, amido, oxycarbonyl or cyano.