Selectivity Modulation of the Ley–Griffith TPAP Oxidation with
<i>N</i>
‐Oxide Salts
作者:Peter W. Moore、Yanxiao Jiao、Paul M. Mirzayans、Lexter Ng Qi Sheng、Jordan P. Hooker、Craig M. Williams
DOI:10.1002/ejoc.201600453
日期:2016.7
tetraphenylborate salts were synthesized and evaluated as co-oxidants in the Ley–Griffith (TPAP) oxidation of benzylic and allylic alcohols under non-anhydrous conditions. The novel DABCOO·TPB (2:1) salt was herein unearthed as a viable competitor to the first-generation NMO·TPB (2:1) salt, but more importantly gave increased performance under oxidative competition. X-ray crystal structure analysis and NMR spectroscopy
ACESULFAME POTASSIUM COMPOSITIONS AND PROCESSES FOR PRODUCING SAME
申请人:CELANESE INTERNATIONAL CORPORATION
公开号:US20180079735A1
公开(公告)日:2018-03-22
A process for producing acesulfame potassium, the process comprising the steps of providing a cyclizing agent composition comprising a cyclizing agent and a solvent and having an initial temperature, cooling the cyclizing agent composition to form a cooled cyclizing agent composition having a cooled temperature less than 35° C., reacting an acetoacetamide salt with the cyclizing agent in the cooled cyclizing agent composition to form a cyclic sulfur trioxide adduct composition comprising cyclic sulfur trioxide adduct; and, forming from the cyclic sulfur trioxide adduct in the cyclic sulfur trioxide adduct composition the finished acesulfame potassium composition comprising non-chlorinated acesulfame potassium and less than 39 wppm 5-chloro-acesulfame potassium. The cooled temperature is at least 2° C. less than the initial temperature.
A catalyst‐free, charge‐transfer complex promoted coupling of sulfonyl chlorides with vicinal tertiary diamines to generate sulfonamides is presented. Mechanistic studies showed that these reactions are proceeded via charge transfer of vicinal tertiary diamines to sulfonyl chlorides, forming the unstable sulfonyl quaternary ammonium like complexes which induced the regiospecific intramolecular C−N
Processes and intermediates useful for preparing integrase inhibitor compounds
申请人:Evans W. Jared
公开号:US20080039487A1
公开(公告)日:2008-02-14
The invention provides processes and intermediates useful for preparing integrase inhibiting compounds.
本发明提供了用于制备整合酶抑制化合物的工艺和中间体。
Visible-Light-Promoted CC Bond Cleavage: Photocatalytic Generation of Iminium Ions and Amino Radicals
作者:Shunyou Cai、Xinyang Zhao、Xinbo Wang、Qisong Liu、Zigang Li、David Zhigang Wang
DOI:10.1002/anie.201202880
日期:2012.8.6
Photoscissors: Structurally variable and synthetically robust iminiumions and aminoradicals species could be simultaneously generated by visible‐light‐promoted photoredox cleavage of the CC bonds in simple vicinal diamine precursors under very mild reaction conditions.