treatment of pain. This linear heptapeptide possesses a Z-didehydroaminobutanoic acid moiety at the C-terminus. Stereoselective construction of the didehydroamino acid moiety was successfully achieved by application of the tracelessStaudingerligation. The combination of solid-phase peptide synthesis and the Staudingerligation allowed rapid access to not only nobilamide B, but also its macrocyclic analogue
Synthesis of CC biaryl segment of complestatin and chloropeptin: Approach to the right hand CEF-ring system of complestatin
作者:M.K. Gurjar、N.K. Tripathy
DOI:10.1016/s0040-4039(97)00272-4
日期:1997.3
Studies toward CC biaryl linkages between F-6 and E-3 of complestatin and F-7 and E-3 of chloropeptin involving Suzuki cross coupling reaction have been presented.
Highly efficient and facile synthesis of β-enaminones catalyzed by diphenylammonium triflate
作者:Ting-Ting Zhao、Jiang-Long Song、Feng-Qing Hong、Jian-Sheng Xia、Jian-Jun Li
DOI:10.1007/s11696-019-00838-2
日期:2019.11
The catalytic performance of diphenylammonium triflates as an organocatalyst in the synthesis of β-enaminones from various substituted β-diketones and amides (or amines) were evaluated. A wide range of β-enaminones were efficiently synthesized in good to excellent yields under mild reaction conditions. Applying diphenylammonium triflate (DPAT) as catalyst makes this protocol cost-effective, low corrosive and easy to handle.
Evaluation of an enantioselective synthesis of 6-chloro-3,4-dihydro-2H-1,2-benzothiazine-3-carboxylic acid 1,1-dioxide and its derivatives
作者:Zanda Bluke、Meik Sladek、Ulrich Abel、Valerjans Kauss
DOI:10.1007/s10593-015-1679-4
日期:2015.2
enantioselective synthesis of (S)- and (R)-ethyl 3,4-dihydro-2H-1,2-benzothiazine-3-carboxylates is described, starting from (S)- and (R)-methyl 2-acetamido-3-(3-chlorophenyl)propanoates as a source of chirality. A one-pot procedure for transesterification and cleavage of the N-acetyl group was developed to prevent racemization during the hydrolysis of the methyl ester group. It was demonstrated that the
Ruthenium-Catalyzed Pyrrole Synthesis via Oxidative Annulation of Enamides and Alkynes
作者:Bin Li、Nuancheng Wang、Yujie Liang、Shansheng Xu、Baiquan Wang
DOI:10.1021/ol303159h
日期:2013.1.4
An efficient and regioselective ruthenium-catalyzedoxidative annulation of enamides with alkynes via the cleavage of C(sp2)–H/N–H bonds is reported. The reactions can afford N-acetyl substituted or N-unsubstituted pyrroles by altering the reaction conditions slightly.