A rhodium-catalyzed carbonylative transformation of alkyl halides under low pressure of CO has been developed. This robust catalyst system allows using phenols as the carbonylative coupling partner and, meanwhile, exhibits high functional group tolerance and good chemoselectivity. Substrates even with a large steric hindrance group or multiple reaction sites can be selectively converted into the desired
Photoinduced Specific Acylation of Phenolic Hydroxy Groups with Aldehydes
作者:Tairin Kawasaki、Naoki Ishida、Masahiro Murakami
DOI:10.1002/anie.202008897
日期:2020.10.5
specifically acylate phenolic hydroxyl groups through a radical pathway. When a mixture of an aldehyde and a phenol in ethyl acetate is irradiated with blue light in the presence of iridium and nickel bromide catalysts at ambient temperature, phenoxyl and acyl radicals are transiently generated in situ and cross‐couple to furnish an ester. Aliphatic hydroxygroups remain untouched under the reaction conditions
MIXED DISULFIDE CONJUGATES OF THIENOPYRIDINE COMPOUNDS AND USES THEREOF
申请人:The Regents of The University of Michigan
公开号:EP3288590B1
公开(公告)日:2021-03-03
METHOD OF MANUFACTURING SEMICONDUCTOR DEVICE, ACID ETCHING RESISTANCE MATERIAL AND COPOLYMER
申请人:Asakawa Koji
公开号:US20080261149A1
公开(公告)日:2008-10-23
Disclosed is an acid etching resistance material comprising a compound having a repeating unit represented by the following general formula (1):
(in the general formula (1), R
1
is a hydrogen atom or methyl group; R
3
is a cyclic group selected from an alicyclic group and an aromatic group; R
4
is a polar group; R
2
is a group represented by the following general formula (2); and j is 0 or 1):
(in the general formula (2), R
5
is a hydrogen atom or methyl group).