Pd-Catalyzed Regioselective Decarboxylative/C–H α-Alkoxyalkenylation of Heterocycles Using α-Carboxyvinylethers
摘要:
A direct introduction of vinyl ethers into C-H bond of heterocycles is reported. For this purpose, decarboxylative direct C-H cross-coupling of 1,3-diazoles with alpha-carboxyvinyl ethers as coupling partners was achieved under Pd(0)/Cu(I) cooperative catalysis to produce various alpha-heteroarylated vinylethers. This methodology was applied to the innovative production of heteroarylated enolizable ketones and naturally occurring bis-oxa(thia)zoles.
Synthesis of novel cinnamanilides as potential immunosuppressive agents
摘要:
A series of new cinnamanilides (6-40) were synthesized and their immunosuppressive activity and cytotoxicity were evaluated. Most of the cinnamanilides showed good immunosuppressive activity. Among the synthesized compounds, (Z)-N-(4-bromophenyl)-2-methoxy-3-(4-methoxyphenyl)acrylamide (37) and (Z)-2-methoxy-3-(4-methoxyphenyl)-N-p-tolylacrylamide (38) exhibited potent immunosuppressive activity (IC50 = 1.77 +/- 0.33 and 0.94 +/- 0.13 mu M) without significant cytotoxicity. (C) 2011 Elsevier Masson SAS. All rights reserved.