Microwave-Assisted Pd/Cu-Catalyzed C-8 Direct Alkenylation of Purines and Related Azoles: An Alternative Access to 6,8,9-Trisubstituted Purines
摘要:
An efficient microwave-assisted palladium/copper comediated C-8 direct alkenylation of purines with styryl bromides has been developed. The method is regioselective, functional group tolerant, rapid, and compatible with other related azoles. Combined with subsequent nucleophilic substitution, it provides an easy access to new 6,8,9-trisubstituted purines.
The versatile palladium complex Pd(PPh3)4 catalyses both direct arylation and alkenylation of oxazoles efficiently. The method is regioselective and stereospecific with respect to bromoalkenes and tolerates a wide range of functional groups.
Ligand promoted Pd-catalyzed dehydrogenative alkenylation of hetereoarenes
作者:Wei-Chih Lee、Ting-Hsuan Wang、Tiow-Gan Ong
DOI:10.1039/c3cc48750d
日期:——
An efficient Pd-catalyzed cross-dehydrogenative coupling of heteroarenes with alkenes has been developed. This alkenylation paradigm encompasses a wide range of substrates and provides a straightforward approach toward C2-E-alkenylated azole motifs.
Stereoselective Direct Copper-Catalyzed Alkenylation of Oxazoles with Bromoalkenes
作者:François Besselièvre、Sandrine Piguel、Florence Mahuteau-Betzer、David S. Grierson
DOI:10.1021/ol801512q
日期:2008.9.18
A copper-catalyzeddirectalkenylation of oxazoles with bromoalkenes has been developed. The method is both regio- and stereoselective and tolerates a variety of functional groups. A wide range of 2-E-vinyl-substituted oxazoles were obtained in high yields including the highly fluorescent alkaloid annuloline.
Arylation, Vinylation, and Alkynylation of Electron-Deficient (Hetero)arenes Using Iodonium Salts
作者:Chuan Liu、Qiu Wang
DOI:10.1021/acs.orglett.6b02550
日期:2016.10.7
Arylation, vinylation, and alkynylation of electron-deficient arenes and heteroarenes have been achieved by chemoselective C–H zincation followed by copper-catalyzed coupling reactions using iodoniumsalts. This approach offers a direct and general access to a wide scope of (hetero)biaryls as well as alkenylated and alkynylated heteroarenes under mild conditions. It is particularly useful and valuable
[EN] THIAZOLE AND OXAZOLE KINASE INHIBITORS<br/>[FR] INHIBITEURS DE KINASES THIAZOLES ET OXAZOLES
申请人:AB SCIENCE
公开号:WO2011086085A1
公开(公告)日:2011-07-21
The present invention is concerned with substituted azole derivatives that selectively modulate, regulate, and/or inhibit signal transduction mediated by certain native and/or mutant proteine kinases implicated in a variety of human and animal diseases such as cell proliferative, metabolic, allergic, and degenerative disorders. In particular, several of these compounds are potent and selective Flt-3 inhibitors or/and syk inhibitors.