Diarylthiophenes as inhibitors of the pore-forming protein perforin
摘要:
Evolution from a furan-containing high-throughput screen (HTS) hit (1) resulted in isobenzofuran-1(3H)-one (2) as a potent inhibitor of the function of both isolated perforin protein and perforin delivered in situ by intact KHYG-1 NK cells. In the current study, structure-activity relationship (SAR) development towards a novel series of diarylthiophene analogues has continued through the use of substituted-benzene and -pyridyl moieties as bioisosteres for 2-thioxoimidazolidin-4-one (A) on a thiophene (B) -isobenzofuranone (C) scaffold. The resulting compounds were tested for their ability to inhibit perforin lytic activity in vitro. Carboxamide (23) shows a 4-fold increase over (2) in lytic activity against isolated perforin and provides good rationale for continued development within this class. (C) 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license.
Diarylthiophenes as inhibitors of the pore-forming protein perforin
摘要:
Evolution from a furan-containing high-throughput screen (HTS) hit (1) resulted in isobenzofuran-1(3H)-one (2) as a potent inhibitor of the function of both isolated perforin protein and perforin delivered in situ by intact KHYG-1 NK cells. In the current study, structure-activity relationship (SAR) development towards a novel series of diarylthiophene analogues has continued through the use of substituted-benzene and -pyridyl moieties as bioisosteres for 2-thioxoimidazolidin-4-one (A) on a thiophene (B) -isobenzofuranone (C) scaffold. The resulting compounds were tested for their ability to inhibit perforin lytic activity in vitro. Carboxamide (23) shows a 4-fold increase over (2) in lytic activity against isolated perforin and provides good rationale for continued development within this class. (C) 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license.
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‐Difluoroallylation of Aryl Halides and Pseudo Halides with Difluoroallylboron Reagents in High Regioselectivity
作者:Shu Sakamoto、Trevor W. Butcher、Jonathan L. Yang、John F. Hartwig
DOI:10.1002/anie.202111476
日期:2021.12
coupling of a difluoroallylboronate with aryl and heteroaryl halides and triflates provides a convenient and broadly applicable synthesis of difluoroallylarenes. The difluoroallyl boron reagent is formed by a copper-catalyzed defluorinative borylation of the inexpensive reagent 3,3,3-trifluoropropene, and the products undergo a wide range of reactions to a series of difluoro-substituted analogs of common
Method for the preparation of citalopram comprising reaction of a compound of Formula (IV)
1
wherein R is halogen, or CF
3
—(CF
2
)
n
—SO
2
—, n being 0 to 8, with a cyanide source in the presence of a palladium catalyst and a catalytic amount of C
+
or Zn
2+
, or with Zn(CN)
2
in the presence of a palladium catalyst.
A new photoredox-catalyzed CN coupling reaction of sulfoximines with aryl halides has been developed for a general N-arylation of sulfoximines. The reactions proceed in the presence of visible light with high levels of chemoselectivity and a wide range of functionality is tolerated. There is a rapidly increasing interest in sulfoximines as pharmacophores in drug discovery and this new method offers
[EN] A PROCESS FOR THE PREPARATION OF ESCITALOPRAM<br/>[FR] PROCÉDÉ DE SYNTHÈSE DE L'ESCITALOPRAM
申请人:NATCO PHARMA LTD
公开号:WO2006025071A1
公开(公告)日:2006-03-09
The present invention relates to an improved process for the preparation of escitalopram of the formula-(I) which consists of a sequential double Grignard reaction on 5-iodophthalide to get the dihydroxy compound of formula-(XVI), its resolution using a chiral acid, cyclization of resolved compound of the formula-(XVII), and cyanation of compound of the formula-(XVIII) using DMF and copper (I) cyanide. The present process utilizes the facile displacement of iodo group with cyano group in the final step of escitalopram. Escitalopram is a widely used anti-depressant.
The invention provides a new and improved method for the preparation of 5-cyano-phtalid, which is a key intermediate in the preparation of the antidepressant compound citalopram.