[EN] PROCESS FOR PREPARATION OF HIGHLY PURE 3-DIMETHYLAMINOPHENYL DIMETHYLCARBAMATE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE DIMÉTHYLCARBAMATE DE 3-DIMÉTHYLAMINOPHÉNYLE HAUTEMENT PUR
申请人:NEON LAB LTD
公开号:WO2012131699A1
公开(公告)日:2012-10-04
The invention discloses a novel process for preparation of highly pure 3-dimethylaminophenyl dimethylcarbamate via formation of aryl dimethylcarbamate which can be easily obtained from diaryl carbonate and dimethylamine.
A process for the concurrent transfer of both the NHC ligand and the difluoromethyl group from [(SIPr)Ag(CF2H)] to PdX2 (X = Cl, OAc, and OPiv) for the preparation of [(SIPr)Pd(CF2H)X] complexes is described. These complexes were air-stable and easily underwent transmetalation with aryl pinacolboronate/reductive elimination to generate ArCF2H in high yields. Based on this discovery, the first one-pot
anilines were converted to aryl boronate esters in moderate to good yields with wide functional group tolerance under simple and ambient photochemical conditions. This transformation achieved the direct and facile C–N bond activation of unreactive anilines, providing a convenient and practical route transforming widely available anilines into useful aryl boronate esters.
Synthesis and Preliminary Pharmacology of an Internal Standard for Assay of Neostigmine
作者:H.E. Ward、J.J. Freeman、J.W. Sowell、J.W. Koshx
DOI:10.1002/jps.2600700423
日期:1981.4
The synthesis of the diethyl analog of neostigmine, its preliminarypharmacology, and its use as an internalstandard for the GLC assay of neostigmine are described. Both the diethyl analog and neostigmine undergo thermal demethylation in the injection port. The column selected produced satisfactory resolution and short retention times for neostigmine and the diethyl analog. The diethyl analog apparently