Efficient Difluoromethylation of Alcohols Using TMSCF<sub>2</sub>Br as a Unique and Practical Difluorocarbene Reagent under Mild Conditions
作者:Qiqiang Xie、Chuanfa Ni、Rongyi Zhang、Lingchun Li、Jian Rong、Jinbo Hu
DOI:10.1002/anie.201611823
日期:2017.3.13
difluoromethylation of alcohols using commercially available TMSCF2Br (TMS=trimethylsilyl) as a unique and practical difluorocarbene source is developed. This method allows primary, secondary, and even tertiary alkyl difluoromethyl ethers to be synthesized under weakly basic or acidic conditions. The reaction mainly proceeds through the direct interaction between a neutral alcohol and difluorocarbene
Aryloxy Radicals from Diaryloxydiazirines: α-Cleavage of Diaryloxycarbenes or Excited Diazirines?
作者:Jean-Marie Fedé、Steffen Jockusch、Nan Lin、Robert A. Moss、Nicholas J. Turro
DOI:10.1021/ol030123z
日期:2003.12.1
The synthesis of diaryloxydiazirines, precursors to diaryloxycarbenes, is described. Thermolyses of the diazirines afford anticipated carbene products, but photolyses afford both carbenes and aryloxy radicals by alpha-scission. UV spectra of the carbenes and radicals are observed. [reaction: see text]
[EN] SUBSTITUTED AZA-BRIDGED BICYCLICS FOR CARDIOVASCULAR AND CNS DISEASE<br/>[FR] COMPOSÉS BICYCLIQUES SUBSTITUÉS À PONT AZA POUR MALADIE CARDIOVASCULAIRE ET DU SYSTÈME NERVEUX CENTRAL
申请人:DECODE GENETICS EHF
公开号:WO2010059836A1
公开(公告)日:2010-05-27
The invention relates to substituted imidazopyridines, pyrazolotriazinones, triazolopyridines, pyrazolopyridines and pyrazolopyrimidines that are useful for treating stroke, myocardial infarct, and cardiovascular inflammatory conditions, to pharmaceutical compositions comprising these compounds, and to methods for the treatment of stroke, myocardial infarct, and cardiovascular inflammatory conditions in a mammal. The compounds have general formula I (I) or II (II) in which Cy1 and Cy2 are carbocycles or heterocycles.
Anomalous reimer-tiemann reaction from phenol, chloroform and potassium fluoride in sulfolane.
作者:Bernard R. Langlois
DOI:10.1016/s0040-4039(00)79769-3
日期:1991.7
opposed to chloroform in the presence of potassium fluoride and sulfolane. (Difluoromethoxy) benzene and phenyl ortho- formate are formed. This leads to questions about the mechanism of the Reimer-Tiemannreaction.
[EN] NOVEL POLYMORPHS OF 4-[3-CHLORO-4-(N'-CYCLOPROPYL UREIDO)PHENOXY]-7-METHOXYQUINOLINE-6-CARBOXAMIDE, ITS SALTS AND PROCESS FOR THE PREPARATION THEREOF<br/>[FR] NOUVEAUX POLYMORPHES DE 4-[3-CHLORO-4-(N'-CYCLOPROPYL URÉIDO)PHÉNOXY]-7-MÉTHOXYQUINOLINE-6-CARBOXAMIDE, LEURS SELS ET LEUR PROCÉDÉ DE PRÉPARATION
申请人:MSN LABORATORIES PRIVATE LTD R&D CENTER
公开号:WO2019111283A1
公开(公告)日:2019-06-13
The present invention relates to novel polymorphs of 4-[3-chloro-4-(N'- cyclopropyl ureido) phenoxy]-7- methoxyquinoline- 6- carboxamide methanesulfonate represented by following structural formula-1a and process for preparation thereof. Further, the present invention relates to an improved process for the preparation of 4-[3-chloro-4- (N'-cyclopropylureido) phenoxy]-7-methoxyquinoline-6-carboxamide compound of formula-1 or its salts and its intermediates thereof.