New greenfluorescentprotein (GFP) chromophoreanalogues, namely 4-(diarylmethylene)imidazolinones (DAINs), were readily synthesized under weakly acidic conditions using a novel condensation reaction between methyl imidate (or thioimidate) and ethyl N-(diarylmethylene)glycinate. DAINs showed notable fluorescence properties. Although they were nearly non-fluorescent in the solution, visible emissions
A small molecular model compound for the green fluorescent proteinchromophore was readily synthesized by a novel condensation reaction of (thio)imidate with imino-ester via an aziridine intermediate. This compound showed fluorescence in the solid and frozen solution states but not in the solution state. Its fluorescent property was successfully applied in the detection of dsDNA.
作者:Ajay K. Bose、M.S. Manhas、J.M. van der Veen、S.G. Amin、I.F. Fernandez、K. Gala、R. Gruska、J.C. Kapur、M.S. Khajavi、J. Kreder、L. Mukkavilli、B. Ram、M. Sugiura、J.E. Vincent
DOI:10.1016/s0040-4020(01)88885-2
日期:1981.1
A safe and convenient method is described for the synthesis of α-amido-β-lactams starting with glycine and an azomethine. The amino group of glycine is protected by reaction with a β-dicarbonyl compound following the method of Dane etal. and the carboxyl group is activated through the formation of a mixed anhydride or an active ester. Condensation between these glycine derivatives and acyclic or cyclic
Synthesis of 1-Thio-Substituted Isoquinoline Derivatives by Tandem Cyclization of Isothiocyanates
作者:Li-Rong Wen、Qian Dou、Yuan-Chao Wang、Jin-Wei Zhang、Wei-Si Guo、Ming Li
DOI:10.1021/acs.joc.6b02605
日期:2017.2.3
A copper-catalyzed tandem arylation–cyclization process to access 1-(arylthio)isoquinolines from isothiocyanates and diaryliodonium salts is described. It is the first general method to construct the potentially useful 1-(arylthio)isoquinoline derivatives. Moreover, 1-(methylthio)isoquinoline derivatives were also achieved successfully with MeOTf instead of diaryliodonium salts under metal-free conditions
An efficient synthetic methodology has been developed to construct 1-aryl-3,4-dihydroisoquinoline derivatives. The reaction was performed under neutral conditions by a palladium-catalyzeddesulfitative carbon–carbon cross-coupling protocol.