Nouveaux dérivés de benzylsulfinylacétamide, utilisation en thérapeutique et procédé de préparation
申请人:LABORATOIRE L. LAFON
Société anonyme dite:
公开号:EP0097072A1
公开(公告)日:1983-12-28
La présente invention concerne en tant que produits industriels nouveaux, les méthoxybenzylsulfinyl-acétamides de formule
(où R est H ou CH2CH2B, B représentant un groupe diéthylamino, diméthylamino, morpholino, pipéridino, pyrrolidino, hexaméthylène-imino ou pipérazino) et leurs sels quand R comporte un reste basique.
本发明涉及式(其中 R 为 H 或 CH2CH2B,B 代表二乙氨基、二甲氨基、吗啉基、哌啶基、吡咯烷基、六亚甲基亚氨基或哌嗪基)的甲氧基苄基亚磺酰基乙酰胺及其盐(当 R 含有碱性残基时),作为新的工业产品。
Thioasparagine and derivatives for peptide synthesis. A trifluoroacetic acid catalyzed anisyl transfer to sulfur
作者:Charlotte Ressler、Some N. Banerjee
DOI:10.1021/jo00870a010
日期:1976.4
Kinetics and Mechanism of the Aminolysis of Phenyl Dithioacetates in Acetonitrile
作者:Hyuck Keun Oh、So Young Woo、Chul Ho Shin、Young Sook Park、Ikchoon Lee
DOI:10.1021/jo970413r
日期:1997.8.1
The aminolysis reactions of phenyl dithioacetates with anilines (AN), N,N-dimethylanilines (DMA), and benzylamines (BA) in acetonitrile are investigated. The mechanism is relatively simple, involving a zwitterionic tetrahedral intermediate, T+/-, and is uncomplicated by the fast proton transfer step which may become rate limiting in the aminolysis of thiono and dithio esters and carbonates with poor leaving groups in water. The mechanism changes from rate-limiting expulsion of the leaving group with beta(X) = 0.80-0.86 and beta(Z) = -0.71 to -0.84 for ANs and DMAs to rate-limiting attack by the nucleophile with much smaller magnitudes of beta(X) and beta(Z) for BAs. The relatively large beta(XZ) values for the former series and a smaller beta(XZ) for the latter series support the proposed mechanistic change.
H-β-zeolite catalyzed transamidation of carboxamides, phthalimide, formamides and thioamides with amines under neat conditions
Efficienttransamidation of unactivated carboxamides, phthalimides, formamides and thioamides with amines undersolvent-freeconditions using H-β-zeolite as a green and recyclable heterogeneous catalyst is described. Easy work up, high purity of the products, recyclability and environmentally-friendly nature of the catalyst are the attractive features of the present methodology. This is the first report