we report an efficient protocol for the C(sp2)–H carbonylation of amino acid derivatives based on an inexpensive cobalt(II) salt catalyst. Carbonylation was accomplished using picolinamide as a tracelessdirectinggroup, CO (1 atm) as the carbonyl source, and Co(dpm)2 as the catalyst. A broad range of phenylalanine derivatives bearing diverse functional groups were tolerated. Moreover, the method can
The invention provides novel compounds having the general formula (I)
wherein R1, R2, R3, R4, R5, R6, R7, R8, A, X and R11 are as described herein, compositions including the compounds and methods of using the compounds.
Few (Z)-alpha-N-benzoylamino-beta-(fluorophenyl)-acrylic acids and their esters were prepared by known procedures and hydrogenated to the corresponding optically active alpha-benzoyl-beta-(fluorophenyl)-alanine derivatives with optical yields up to 90% using the rhodium complexes of "PROPRAPHOS" and O,N-bis(diphenylphosphino)-2-exo-hydroxy, 3-endo-methylamino-norbornane as chiral catalysts. The method proved to be apt for upscaling the preparation. Deacylation of the obtained amino acids gave the hydrochlorides of the fluorinated phenylalanines in very pure state.
DIFLUOROKETAMIDE DERIVATIVES AS HTRA1 INHIBITORS
申请人:Hoffmann-La Roche Inc.
公开号:US20190185427A1
公开(公告)日:2019-06-20
The invention provides novel compounds having the general formula (I)
wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
, R
8
, A, X and R
11
are as described herein, compositions including the compounds and methods of using the compounds.