Continuous flow process for the synthesis of phenylhydrazine salts and substituted phenylhydrazine salts
申请人:SHANGHAI HYBRID—CHEM TECHNOLOGIES
公开号:US11040938B2
公开(公告)日:2021-06-22
The present invention provided a continuous flow process for the synthesis of phenylhydrazine salts and substituted phenylhydrazine salts. Diazotization, reduction, acidic hydrolysis and salifying with acids are innovatively integrated together. Using acidic liquids of aniline or substituted aniline, diazotization reagents, reductants and acids as raw materials, phenylhydrazine derivative salts is obtained through the synthesis process, which is a three-step continuous tandem reaction including diazotization, reduction, acidic hydrolysis and salifying. The described synthesis process is a kind of integrated solutions, which is carried out in an integrated reactor. The feed inlets of the integrated reactor are continuously filled with raw materials. In the integrated reactor, diazotization, reduction, acidic hydrolysis and salifying are carried out continuously and orderly, and phenylhydrazine salts or substituted phenylhydrazine salts is obtained in the outlet of the integrated reactor without interruption. The total reaction time is no more than 20 min.
Discovery of (3<i>S</i>,3a<i>R</i>)-2-(3-Chloro-4-cyanophenyl)-3-cyclopentyl-3,3a,4,5-tetrahydro-2<i>H</i>-benzo[<i>g</i>]indazole-7-carboxylic Acid (PF-3882845), an Orally Efficacious Mineralocorticoid Receptor (MR) Antagonist for Hypertension and Nephropathy
作者:Marvin J. Meyers、Graciela B. Arhancet、Susan L. Hockerman、Xiangyang Chen、Scott A. Long、Matthew W. Mahoney、Joseph R. Rico、Danny J. Garland、James. R. Blinn、Joe T. Collins、Shengtian Yang、Horng-Chih Huang、Kevin F. McGee、Jay M. Wendling、Jessica D. Dietz、Maria A. Payne、Bruce L. Homer、Marcia I. Heron、David B. Reitz、Xiao Hu
DOI:10.1021/jm100505n
日期:2010.8.26
We have discovered a novel class of nonsteroidal pyrazoline antagonists of the mineralocorticoid receptor (M R) that show excellent potency and selectivity against other nuclear receptors. Early analogues were poorly soluble and had a propensity to inhibit the hERG channel. Remarkably, both of these challenges were overcome by incorporation of a single carboxylate moiety. Structural modification of carboxylate-containing lead R-4g with a wide range of substituents at each position of the pyrazoline ring resulted in R-12o, which shows excellent activity against MR and reasonable pharmacokinetic profile. Introduction of conformational restriction led to a novel series characterized by exquisite potency and favorable steroid receptor selectivity and pharmacokinetic profile. Oral dosing of 3S,3aR-27d (PF-3882845) in the Dahl salt sensitive preclinical model of salt-induced hypertension and nephropathy showed blood pressure attenuation significantly greater than that with eplerenone, reduction in urinary albumin, and renal protection. As a result of these findings, 3S,3aR-27d was advanced to clinical studies.