Visible-Light-Induced Intramolecular C(sp<sup>2</sup>)–H Amination and Aziridination of Azidoformates via a Triplet Nitrene Pathway
作者:Yipin Zhang、Xunqing Dong、Yanan Wu、Guigen Li、Hongjian Lu
DOI:10.1021/acs.orglett.8b01980
日期:2018.8.17
Catalytic intramolecular C–H amination and aziridination reactions of o-allylphenyl azidoformates have been achieved under visible-light irradiation, providing a mild, clean, and efficient method for the synthesis of useful benzoxazolones and [5.1.0] bicyclic aziridines. Mechanistic studies suggest that a triplet nitrene acts as the reactive intermediate. The chemoselectivity of the reaction, with alkyl
Process for the preparation of halogenated aromatics
申请人:Bayer Aktiengesellschaft
公开号:US05306849A1
公开(公告)日:1994-04-26
Halogenated aromatics are prepared by heating halogenoformic acid esters to 80.degree. to 280.degree. C. in the presence of hydrogen fluoride or a catalytic amount of one or more Lewis acids from the group comprising aluminium halides, iron halides and antimony halides, and in the liquid phase.
The invention relates to a preparation process for making peroxy esters and peroxy carbonates, peroxy ester peroxy carbonates, mixed diperoxides, mixed diperoxy esters, and mixed diperoxy carbonates, and to specific monoperoxy esters, monoperoxy carbonates, mixed peroxides, mixed diperoxy esters, mixed diperoxy carbonates, peroxy ester peroxy carbonates, and mixtures thereof. The process involves the reaction of a type-3 ketone peroxide with a reactive carbonyl compound and optional subsequent reaction with an alkyl vinyl ether, acetal, halogen formate, or carboxylic acid anhydride.
Ketone peroxide derivatives, their preparation and use
申请人:——
公开号:US20040260111A1
公开(公告)日:2004-12-23
The invention relates to peroxides derivable from
1
The invention further relates to the process to make these peroxides as well as to their use in polymerization, curing, and modification reactions.