Catalytic Hydrogenation of Chiral α-Amino and α-Hydroxy Esters at Room Temperature with Nishimura Catalyst without Racemization
摘要:
The hydrogenation or carboxylic acid derivatives at room temperature was investigated. With a mixed Rh/Pt oxide (Nishimura catalyst), low to medium activity was observed for various alpha-amino and alpha-hydroxy esters. At 100 bar hydrogen pressure and 10% catalysts loading, high yields or tire desired amino alcohols and diols were obtained without racemization. The most suitable alpha-substituents were NH2, NHR, and 011, whereas beta-NH2 were less effective. Usually, aromatic rings were also hydrogenated, but with the free bases of amino acids as substrates, some selectivity was observed. No reaction was round for alpha-NR2, alpha-OR, and unfunctionalized esters; acids and amides, were also not reduced under these conditions. A working hypothesis for the mode or action of the catalyst is presented.
[EN] FUSED PYRAZOLE DERIVATIVES AS JAK INHIBITORS<br/>[FR] DÉRIVÉS DE PYRAZOLE CONDENSÉS UTILISÉS EN TANT QU'INHIBITEURS DE JAK
申请人:ALMIRALL SA
公开号:WO2017220431A1
公开(公告)日:2017-12-28
Novel fused pyrazole derivatives of Formula (I) are disclosed; as well as process for their preparation, pharmaceutical compositions comprising them and their use in therapy as inhibitors of Janus Kinases (JAK).
Modulators of the Cystic Fibrosis Transmembrane Conductance Regulator Protein and Methods of Use
申请人:AbbVie S.à.r.l.
公开号:US20190077784A1
公开(公告)日:2019-03-14
The invention discloses compounds of Formula (I),
wherein A
1
, R
1
, R
2
, R
3
, R
4
, and n are as defined herein. The present invention relates to compounds and their use in the treatment of cystic fibrosis, methods for their production, pharmaceutical compositions comprising the same, and methods of treating cystic fibrosis by administering a compound of the invention.
The present invention relates compounds of formula (I)
wherein A and R
1
are as defined in the specification, pharmaceutical compositions comprising such compounds, and methods of treating conditions and disorders using such compounds and pharmaceutical compositions.
Disclosed herein are compounds of formula (I)
wherein Ring A and R
1
are as defined in the specification. Pharmaceutical compositions comprising such compounds, and methods for treating conditions and disorders using such compounds and pharmaceutical compositions are also disclosed.
[EN] SUBSTITUTED PYRAZOLO[1,5-A]PYRIDINE COMPOUNDS AS RET KINASE INHIBITORS<br/>[FR] COMPOSÉS SUBSTITUÉS DE PYRAZOLO[1,5-A]PYRIDINE EN TANT QU'INHIBITEURS DE LA KINASE RET
申请人:ANDREWS STEVEN W
公开号:WO2018071447A1
公开(公告)日:2018-04-19
Provided herein are compounds of the Formula I and stereoisomers and pharmaceutically acceptable salts or solvates thereof, in which A, B, X1, X2, X3, X4, Ring D, and E have the meanings given in the specification, which are inhibitors of RET kinase and are useful in the treatment and prevention of diseases which can be treated with a RET kinase inhibitor, including RET-associated diseases and disorders.