Investigation of the scope and mechanism of copper catalyzed regioselective methylthiolation of aryl halides
摘要:
Methylthiolation of structurally diverse aryl halides was accomplished under fluoride free conditions using catalytic amounts of CuI, and DMSO as the methylthiolation source. Optimization studies unveiled several varieties of promoters among which Zn(OAc)(2) was found ideal. The analogous reaction with DMSO-d(6) afforded corresponding deuterated aryl methyl thioether with 99% purity. Mechanistic studies revealed CuSMe as the active methylthiolation agent. (C) 2013 Elsevier Ltd. All rights reserved.
and kinetically competent catalysts for this transformation. The fleeting transmetalation intermediate has been successfully synthesized through an alternative synthetic organometallic pathway at lower temperature, allowing for in situ NMR study of the C–N bond reductive elimination step. This study addresses key factors governing the mechanism of the nickel-catalyzed Buchwald–Hartwig amination process
[EN] BICYCLIC SPHINGOSINE 1-PHOSPHATE ANALOGS<br/>[FR] ANALOGUES BICYCLIQUES DE 1-PHOSPHATE DE SPHINGOSINE
申请人:UNIV VIRGINIA
公开号:WO2009023854A1
公开(公告)日:2009-02-19
Compounds that have agonist activity at one or more of the SlP receptors are provided. The compounds are sphingosine analogs that, after phosphorylation, can behave as agonists at SlP receptors. Formula (I):
Novel sphingosine kinase type 1 inhibitors, compositions and processes for using same
申请人:Zipkin Robert Elliot
公开号:US20100035959A1
公开(公告)日:2010-02-11
Provided are novel compositions which uniquely inhibit sphingosine kinase Type 1 (SphK1) and which are useful in a number of applications including killing or damaging cancer cells, inducing apoptosis, inhibiting growth, metastasis and development of chemoresistance in cancer cells, leukemia, increasing the effectiveness of anti-cancer agents, attenuating immune reactivity, inhibiting survival signaling in cancer cells, and reducing symptoms of multiple sclerosis.
BENZOCYCLOHEPTYL ANALOGS HAVING SPHINGOSINE 1-PHOSPHATE RECEPTOR ACTIVITY
申请人:Lynch Kevin R.
公开号:US20090253761A1
公开(公告)日:2009-10-08
Benzocycloheptyl analogs that have agonist activity at one or more of the S1P receptors are provided. The compounds are sphingosine analogs, which, after phosphorylation, can behave as agonists at S1P receptors.
[EN] COMPOSITIONS AND METHODS FOR INHIBITING SPHINGOSINE KINASE<br/>[FR] COMPOSITIONS ET PROCÉDÉS POUR INHIBER LA SPHINGOSINE KINASE
申请人:UNIV VIRGINIA
公开号:WO2009146112A1
公开(公告)日:2009-12-03
Amidine analogs that can inhibit the activity of sphingosine kinase 1 and sphingosine kinase 2 (SphK1 & SphK2) are provided. The compounds can prevent angiogenesis in tumor cells.