Copper‐Catalyzed C−P Cross‐Coupling of (Cyclo)alkenyl/Aryl Bromides and Secondary Phosphine Oxides with
<i>in</i>
<i>situ</i>
Halogen Exchange
作者:Paweł Woźnicki、Marek Stankevič
DOI:10.1002/ejoc.202100456
日期:2021.6.25
A protocol for copper-catalyzed halogen exchange/C−P cross-coupling between (cyclo)alkenyl/arylbromides and secondary phosphine oxides has been developed. The addition of sodium iodide increases the yield of the cross-coupling by promoting in situ halogen exchange of organic bromides to the corresponding iodides.
[EN] DERIVATIVES OF PYRROLOIMIDAZOLE OR ANALOGUES THEREOF WHICH ARE USEFUL FOR THE TREATMENT OF INTER ALIA CANCER<br/>[FR] DÉRIVÉS DE PYRROLOIMIDAZOLE OU ANALOGUES DE CEUX-CI UTILES, ENTRE AUTRES, DANS LE TRAITEMENT DU CANCER
申请人:EMCURE PHARMACEUTICALS LTD
公开号:WO2017134555A1
公开(公告)日:2017-08-10
Present invention relates to novel heterocyclic compounds as indoleamine 2,3-dioxygenase (IDO) and/or tryptophan 2,3-dioxygenase (TDO) modulators. Compounds of the present invention inhibit tryptophan degradation by modulating IDO and/or TDO. Formula (I) The invention further relates to the process of their preparation, pharmaceutical composition and their use in modulating the activity of indoleamine 2,3-dioxygenase (IDO) and/or tryptophan 2,3- dioxygenase (TDO). The compounds of the invention can be used alone or in combination for the treatment of conditions that benefits from the inhibition of tryptophan degradation.
Selectivity in the reactions of less stable carbocations with magnesium halides in aprotic solvents. A theoretical approach to the constant selectivity principle
作者:A.García Martínez、R.Martínez Alvarez、E. Teso Vilar、A. García Fraile、J. Osío Barcina、L.R. Subramanían
DOI:10.1016/0040-4020(95)00388-o
日期:1995.6
and 4-camphenyl triflate (4a) in carbon disulfide or diethyl ether with added MgI2 and MgBr2 yields a mixture of the corresponding halides 5b-e, 6b-c, 7b-c and 8b-c. The ionization of the triflate group is favoured by coordination with the magnesiumhalides. The reaction with MgI2 was found to be second-order and is about 50 times more reactive than MgBr2. The selectivities of the intermediate cations
A Mild Synthesis of Vinyl Halides and <i>gem</i>-Dihalides Using Triphenyl Phosphite−Halogen-Based Reagents
作者:Alberto Spaggiari、Daniele Vaccari、Paolo Davoli、Giovanni Torre、Fabio Prati
DOI:10.1021/jo061346g
日期:2007.3.1
A new application of (PhO)(3)P-halogen-based reagents to the synthesis of vinyl halides and gem-dihalides is described. Vinyl halides were prepared in good to excellent yields from enolizable ketones, whereas aldehydes afforded the corresponding gem-dihalides. The halogenation proceeded smoothly under mild conditions.
A regioselective entry to vinyl lithiums from unsymmetrical ketones via enol triflates
作者:William D. Wulff、Glen A. Peterson、William E. Bauta、Kin-Shing Chan、Katherine L. Faron、Scott R. Gilbertson、Ralph W. Kaesler、Dominic C. Yang、Christopher K. Murray