Organosilicon synthesis of isocyanates: III. Synthesis of aliphatic, carbocyclic, aromatic, and alkylaromatic isocyanatocatboxylic acid esters
摘要:
A series of aminoacid esters was prepared by treating the aminoacid suspensions in ethanol with thionyl chloride. Best conversion of aminoacid esters to corresponding isocyanates was achieved in the case of aromatic and carbocyclic aminoesters by phosgeneation of their N-silyl derivatives, and in the case of aliphatic and alkylaromatic aminoesters by phosgeneation of O-silyl or N,O-bissilylurethanes on their basis. In the last case additional step of esterification of the by-products isocyanatoalkylcarboxylic acid chlorides is reqired after phosgeneation. Unusual generation of cynnamates and intramolecular N -> O-migration of trimethylsilyl group in the solutions of silylated alkylaromatic beta-aminoacid esters were found.
The invention is directed to [1,2,4]thiadiazine 1,1-dioxide compounds and pharmaceutical compositions containing such compounds that are useful in treating infections by hepatitis C virus.
[1,2,4]THIADIAZIN-3-YL ACETIC ACID COMPOUND[[S]] AND METHODS OF MAKING THE ACETIC ACID COMPOUND
申请人:Ruebsam Frank
公开号:US20120116077A1
公开(公告)日:2012-05-10
The invention is directed to [1,2,4]thiadiazine 1,1-dioxide compounds and pharmaceutical compositions containing such compounds that are useful in treating infections by hepatitis C virus.
The invention is directed to [1,2,4]thiadiazine 1,1-dioxide compounds of formula I
wherein A is
B is
and pharmaceutical compositions containing such compounds that are useful in treating infections by hepatitis C virus.
[1,2,4]Thiadiazin-3-yl acetic acid compound and methods of making the acetic acid compound
申请人:Anadys Pharmaceuticals, Inc.
公开号:US08222404B2
公开(公告)日:2012-07-17
The invention is directed to a [7-methanesulfonylamino-methyl)-1,1-dioxo-1,4-dihydro-1λ6-thieno[2,3-e][1,2,4]thiadiazin-3-yl]-acetic acid compound and to methods of making the same.