Substituent effects on the solvolysis of 1,1-diphenyl-2,2,2-trifluoroethyl tosylates. Part III. Effects of electron-donating substituents in the fixed aryl moiety
[EN] AZETIDINECARBOXAMIDE DERIVATIVES AND THEIR USE IN THE TREATMENT OF CB1 RECEPTOR MEDIATED DISORDERS<br/>[FR] DERIVES D'AZETIDINECARBOXAMIDE ET LEUR UTILISATION DANS LE TRAITEMENT DE TROUBLES MEDIES PAR LES RECEPTEUR CB1
申请人:VERNALIS RES LTD
公开号:WO2004096763A1
公开(公告)日:2004-11-11
Compounds of formula (I) and their use in therapy, particularly for the treatment of a disorder mediated by CB1 receptors such as obesity: Formuila (I) wherein: R1 and R2 are independently selected from aryl; and R3 is hydrogen or alkyl; or a pharmaceutically acceptable salt or prodrug thereof, wherein at least one of R1 and R2 has a non-hydrogen substituent in the ortho-position(s) thereof relative to the point of attachment to the [-CH-0-] group.
DIRECT TRIFLUOROMETHYLATIONS USING TRIFLUOROMETHANE
申请人:Prakash G.K. Surya
公开号:US20140066640A1
公开(公告)日:2014-03-06
A direct trifluoromethylation method preferably using a trifluoromethane as a fluoro-methylating species. In particular, the present method is used for preparing a trifluoromethylated substrate by reacting a fluoromethylatable substrate with a trifiuoromethylating agent in the presence of an alkoxide or metal salt of silazane under conditions sufficient to trifluoromethylate the substrate; wherein the fluoromethylatable substrate includes chlorosilanes, carbonyl compounds such as esters, aryl halides, aldehydes, ketones, chalcones, alkyl formates, alkyl halides, aryl halides, alkyl borates, carbon dioxide or sulfur.
Metal-Free Azidation of α-Hydroxy Esters and α-Hydroxy Ketones Using Azidotrimethylsilane
作者:Xiao-Ping Yin、Lei Zhu、Jian Zhou
DOI:10.1002/adsc.201701345
日期:2018.3.20
We herein report a commercially available perchloric acid catalyst capable of catalyzing the azidation of α‐hydroxy esters, α‐hydroxy ketones and taddols using azidotrimethylsilane in dichloromethane at room temperature. Various substituted tertiary alcohols are well tolerated in this reaction. Cα‐tetrasubstituted α‐amino acidderivatives were prepared by one‐pot sequential azidation and hydrogenation
Substituent Effects on the Solvolysis of 1,1-Diphenyl-2,2,2-trifluoroethyl Tosylates: Comparison between Symmetrically Disubstituted and Monosubstituted Systems
The solvolysis rates of 1-(substituted phenyl)-1-phenyl-2,2,2-trifluoroethyl and 1,1-bis(substituted phenyl)-2,2,2-trifluoroethyl tosylates or bromides were conductimetrically measured at 25.0 °C i...
Hyperbranched Polymers with Controlled Degree of Branching from 0 to 100%
作者:Yukari Segawa、Tomoya Higashihara、Mitsuru Ueda
DOI:10.1021/ja105213r
日期:2010.8.18
A linear polymer, hyperbranchedpolymers with various degrees of branching, and 100% hyperbranchedpolymers were successfully synthesized by self-polycondensation of 2,2,2-trifluoro-1-[4-(4-phenoxyphenoxy)phenyl]ethanone by using different amounts of trifluoromethanesulfonic acid from the same AB(2) monomer.