[EN] 6,7-DIHYDRO-4H-PYRAZOLO[1,5-A]PYRAZINE COMPOUNDS FOR THE TREATMENT OF INFECTIOUS DISEASES<br/>[FR] COMPOSÉS DE 6,7-DIHYDRO-4H-PYRAZOLO[1,5-A]PYRAZINE POUR LE TRAITEMENT DE MALADIES INFECTIEUSES
申请人:HOFFMANN LA ROCHE
公开号:WO2018011160A1
公开(公告)日:2018-01-18
The present invention relates to compounds of the formula (I) or pharmaceutically acceptable salts, enantiomer or diastereomer thereof, wherein R1 to R4 are as described above. The compounds may be useful for the treatment or prophylaxis of hepatitis B virus infection.
A novel strategy for the synthesis of oxazolidin‐2‐ones from vicinal diols and urea is described. In this heterocycle synthesis, two different C−O and C−N bonds are sequentially formed in a domino process consisting of nucleophilic substitution and alcohol amination. The use of readily available starting materials and the good atom economy render this process environmentally benign. While this transformation
Chemo-enzymatic synthesis of 1,2- and 1,3- amino-alcohols and their use in the enantioselective reduction of acetophenone and anti-acetophenone oxime methyl ether with borane.
作者:Eric Didier、Bernard Loubinoux、Gerardo H. Ramos Tombo、Grety Rihs
DOI:10.1016/s0040-4020(01)80959-5
日期:1991.1
New chiral amino-alcohols were enantioselectively synthesized using biotransformations as the key steps. They were used as ligand in the enantioselective borane reduction of acetophenone and of the corresponding anti oxime methylether.
Herein, we report the development of a tailored cobalt catalyst system of Cp*Co(III)(LX) toward intramolecular C-H nitrene insertion of azidoformates to afford cyclic carbamates. The cobalt complexes were easy to prepare and bench-stable, thus offering a convenient reaction protocol. The catalytic reactivity was significantly improved by the electronic tuning of the bidentate LX ligands, and the observed
Enzymatic Dynamic Kinetic Resolution of (±)-<i>cis</i>-<i>N</i>-(Alkoxycarbonyl)cyclopentane-1,2-diamines based on Spontaneous Racemization
作者:F. Javier Quijada、Vicente Gotor、Francisca Rebolledo
DOI:10.1021/ol101378k
日期:2010.8.20
acetylation of different (±)-cis-N-(alkoxycarbonyl)cyclopentane-1,2-diamines. Depending on the alkoxycarbonyl group, a simple kineticresolution (Boc-derivative) or an interesting dynamic kineticresolution (DKR with Cbz-, Alloc, and ethoxycarbonyl derivatives) has been developed. Racemization for the DKR occurred due to the N,N′ intramolecular migration of the alkoxycarbonyl group.