Chemoselective esterification of α-hydroxyacids catalyzed by salicylaldehyde through induced intramolecularity
作者:Shiue-Shien Weng、Hsin-Chun Li、Teng-Mao Yang
DOI:10.1039/c2ra23068b
日期:——
direct and chemoselective esterification of α-hydroxyacids was developed using a reversible covalent-binding strategy. By taking advantage of acetal chemistry, simple aldehydes can be used to efficientlycatalyze the esterification of α-hydroxy carboxylic acids in the presence of β-hydroxyacid moieties or other carboxylic acids in amounts equal to or in excess of the alcohols. A diverse array of α-aryl
A Serendipitous Synthesis of Bis-Heterocyclic Spiro 3(2<i>H</i>)-Furanones
作者:Alfredo Picado、ShengJian Li、R. Karl Dieter
DOI:10.1021/acs.joc.5b02350
日期:2016.2.19
(Z) Enol triflates 6, 11b–d, (E) enol triflate 11e, and phenol triflate 11a, derived from β-keto esters or 2-carboalkoxy phenols, respectively, react with N-Boc 2-lithiopyrrolidine (5a), N-Boc N-methylaminomethyllithium (5b), or 2-lithio-1,3-dithiane (14) to afford 3(2H)-furanones in modest to good yields (38–81%). Product and carbanion reagent studies suggest that the 3(2H)-furanone is formed in a
Hoefnagel; Peters; Van Bekkum, Recueil des Travaux Chimiques des Pays-Bas, 1996, vol. 115, # 7-8, p. 353 - 356
作者:Hoefnagel、Peters、Van Bekkum
DOI:——
日期:——
Sulfamate Derivative Compounds for Use in Treating or Alleviating Pain
申请人:BIO-PHARM SOLUTIONS CO., LTD.
公开号:US20160311792A1
公开(公告)日:2016-10-27
The present invention relates to sulfamate derivative compounds and a composition for treating and/or alleviating pain containing the sulfamate derivative compounds or a pharmaceutically acceptable salt thereof as an active ingredient. More specifically the present invention relates to a pharmaceutical composition for treating or alleviating pain containing a sulfamate derivative compound and/or a pharmaceutically acceptable salt thereof as an active ingredient. Furthermore, the present invention relates to a method for treatment or alleviation of pain comprising administering a sulfamate derivative compound in a pharmaceutically effective amount to a subject in need of treatment or alleviation of pain.
Generation of o-quinone α-carbomethoxymethide by photolysis of methyl 2-hydroxyphenyldiazoacetate in aqueous solutionDedicated to Professor Dr Z. R. Grabowski and Professor Dr J. Wirz on the occasions of their 75th and 60th birthdays.Electronic supplementary information (ESI) available. Tables S1–S4 of rate data. See http://www.rsc.org/suppdata/cp/b2/b211444p/
作者:Y. Chiang、A. J. Kresge、Y. Zhu
DOI:10.1039/b211444p
日期:2003.2.27
Flashphotolysis of methyl 2-hydroxyphenyldiazoacetate (8) in dilute aqueous perchloric acidsolution and acetic acid and biphosphate ion buffers produced a transientspecies that was identified as o-quinone α-carbomethoxymethide (9). This structural assignment is based upon solvent isotope effects, the form of buffer catalysis, UV absorption maxima, and the identity of decay rate constants with those