Direct use of dioxygen as an oxygen source: catalytic oxidative synthesis of amides
作者:Wei Wei、Xiao-Yu Hu、Xiao-Wei Yan、Qiang Zhang、Ming Cheng、Jian-Xin Ji
DOI:10.1039/c1cc14640h
日期:——
The first transition-metal-catalyzed directoxidative synthesis of amides by usingdioxygen as an oxygen source has been developed under mild conditions, in which DBU was used as the key additive. The present methodology, which utilizes dioxygen as an oxidant and oxygen source and cheap copper salts as catalysts, opens up an interesting and attractive avenue for the synthesis of amide functionality
PROCESS FOR PREPARING [(3-HYDROXYPYRIDINE-2-CARBONYL)AMINO]ALKANOIC ACIDS, ESTERS AND AMIDES
申请人:Akebia Therapeutics, Inc.
公开号:US20150361043A1
公开(公告)日:2015-12-17
Disclosed are processes for preparing [(3-hydroxypyridine-2-carbonyl)amino]-alkanoic acids, derivatives, inter alia, 5-aryl substituted and 5-heteroaryl substituted [(3-hydroxypyridine-2-carbonyl]amino}acetic acids. Further disclosed are methods for making prodrugs of [(3-hydroxypyridine-2-carbonyl)-amino]acetic acids, for example, [(3-hydroxypyridine-2-carbonyl]amino}acetic acid esters and [3-hydroxypyridine-2-carbonyl]amino}acetic acid amides. The disclosed compounds are useful as prolyl hydroxylase inhibitors or for treating conditions wherein prolyl hydroxylase inhibition is desired.
5-((HALOPHENYL)-3-HALO-PYRIDIN-2-YL)-NITRILE DERIVATIVES AS INTERMEDIATES IN THE PREPARATION OF [(5-(HALOPHENYL)-3-HYDROXYPYRIDINE-2-CARBONYL)-AMINO]ALKANOIC ACID DERIVATIVES
申请人:Akebia Therapeutics Inc.
公开号:EP3290404A1
公开(公告)日:2018-03-07
The present invention relates to 5-((halophenyl)-3-halo-pyridin-2-yl)-nitril derivatives used as intermediates in the preparation of [(5-(halophenyl)-3-hydroxypyridine-2-carbonyl)-amino]alkanoic acids. The final compounds are prodrugs of prolyl hydroxylase inhibitors.
PROCESS FOR PREPARING [(5-(3-CHLOROPHENYL)-3-HYDROXYPYRIDINE-2-CARBONYL)-AMINO]ACETIC ACID FROM 5-((3-CHLOROPHENYL)-3-CHLORO-PYRIDIN-2-YL)-NITRILE, AND PROCESS FOR PREPARING 5-((HALOPHENYL)-3-HALO-PYRIDIN-2-YL)-NITRILE DERIVATIVES
申请人:Akebia Therapeutics Inc.
公开号:EP3683209A1
公开(公告)日:2020-07-22
A process for preparing compound (5):
comprising:
A. reacting (3-chlorophenyl)boronic acid:
with 3,5-dichloro-2-cyanopyridine:
in the presence of [1,1'-bis (diphenylphosphino)ferrocene]dichloro palladium(II) and K2 CO3 in DMF at 45C° to form 5-(3-chlorophenyl)-3 -chloro-2-cyanopyridine:
B. reacting 5-(3-chlorophenyl)-3-chloro-2-cyanopyridine with sodium methoxide in methanol at reflux to form 5-(3-chlorophenyl)-3-methoxy-2-cyanopyridine:
C. reacting 5-(3-chlorophenyl)-3-methoxy-2-cyanopyridine with 48% hydrobromic acid at reflux to form 5-(3-chlorophenyl)-3-hydroxypyridine-2-carboxylic acid:
D. reacting 5-(3-chlorophenyl)-3-hydroxypyridine-2-carboxylic acid with glycine methyl ester:
in the presence of CDI and DIPEA in DMSO at room temperature to form methyl [5-(3-chlorophenyl)-3-hydroxypyridin-2-yl]amino}acetate:
E. reacting methyl [5-(3-chlorophenyl)-3-hydroxypyridin-2-yl]amino}acetate with sodium hydroxide in THF to form compound (5):
PROCESS FOR PREPARING N-[[5-(3-CHLOROPHENYL)-3-HYDROXY-2-PYRIDINYL]CARBONYL]-GLYCINE FROM 5-(3-CHLOROPHENYL)-3-HYDROXY-2-PYRIDINE CARBOXYLIC ACID
申请人:Akebia Therapeutics Inc.
公开号:EP4026829A1
公开(公告)日:2022-07-13
The present invention relates to a process for preparing N-[[5-(3- chlorophenyl)-3-hydroxy-2-pyridinyl]carbonyl]-glycine (compound (5)), from the intermediates 5-(3-chlorophenyl)-3-chloro-2- pyridinecarbonitrile (compound (1)), 5-(3-chlorophenyl)-3-methoxy-2- pyridinecarbonitrile (compound (2)), 5-(3-chlorophenyl)-3-hydroxy-2- pyridinecarboxylic acid (compound (3)). Compound (5) is an intermediate in the preparation of prolyl hydroxylase inhibitors.