Cyclic esters of 3,4-dihydroxy-thiophene-1,1-dioxide compounds and
申请人:BASF Aktiengesellschaft
公开号:US04122090A1
公开(公告)日:1978-10-24
Cyclic esters of 3,4-dihydroxy-thiophene-1,1-dioxide and of the corresponding cyclopentadienone compound, and their manufacture. The compounds can be used as "solid forms" of phosgene, thiophosgene or oxalyl chloride, or as acyl transfer agents.
Direct C–H Functionalization of Phenanthrolines: Metal- and Light-Free Dicarbamoylations
作者:David T. Mooney、Benjamin D. T. Donkin、Nemrud Demirel、Peter R. Moore、Ai-Lan Lee
DOI:10.1021/acs.joc.1c02425
日期:2021.12.3
A direct method for C–H dicarbamoylations of phenanthrolines has been developed, which is capable of directly installing primary, secondary as well as tertiary amides. This is a significant improvement on the previous direct method, which was limited to primary amides. The metal-, light-, and catalyst-free Minisci-type reaction is cheap, operationally simple, and scalable. We demonstrate that the step
Palladium-catalyzed decarboxylative <i>ortho</i>-amidation of <i>O</i>-methyl ketoximes with oxamic acids
作者:Kun Jing、Peng-Cheng Cui、Guan-Wu Wang
DOI:10.1039/c9cc06460e
日期:——
The first palladium-catalyzed ortho-amidation of ketoximes has been developed with readily available, easy to handle and environment-friendly N,N-disubstituted oxamic acids as the amidation sources. When N-monosubstituted oxamic acids are used as the substrates, the formed ortho-amidated ketoximes undergo further intramolecular cyclization to provide 3-methyleneisoindolinones.
Construction of C(CO)–C(CO) Bond via NHC-Catalyzed Radical Cross-Coupling Reaction
作者:Hai-Bin Yang、Xiao-Fang Jin、Hui-Ying Jiang、Wenwei Luo
DOI:10.1021/acs.orglett.3c00272
日期:2023.3.24
A C(sp2)–C(sp2) bond can be constructed via a photoredox/N-heterocyclic carbene (NHC)-cocatalyzed radical cross-couplingreaction, which provides a complementary strategy to classic electron pair processes. The present protocol represents the first example of an NHC-catalyzed two-component radical cross-couplingreaction involving C(sp2)-centered radical species. The decarboxylative acylation of oxamic
Carbonylative cyclization of biaryl enones with aldehydes and oxamic acids
作者:Chada Raji Reddy、Dattahari H. Kolgave、Sana Fatima、Remya Ramesh
DOI:10.1039/d4ob00513a
日期:——
An oxidative radical-promoted carbonylative cyclization strategy for the synthesis of phenanthren-9-(10H)-one frameworks from biaryl enones using aldehydes as the carbonyl radical sources is disclosed. The reaction proceeds through a sequential addition of a carbonyl radical to the olefin followed by cyclization with an aryl ring. The method is further extended to carbamoyl radicals generated from
公开了使用醛作为羰基自由基源从联芳烯酮合成菲-9-(10 H )-酮骨架的氧化自由基促进的羰基化环化策略。该反应通过依次将羰基加成到烯烃上,然后用芳环环化来进行。该方法进一步扩展到由草酰胺酸产生的氨基甲酰基,以得到相应的具有酰胺官能团的菲酮。