Cobalt-Catalyzed Enantioselective Directed C–H Alkylation of Indole with Styrenes
摘要:
A cobalt-chiral phosphoramidite catalyst promotes enantioselective imine-directed C2-alkylation of Boc-protected indoles with styrenes. The reaction affords 1,1-diarylethane products in moderate to good yields with good enantioselectivities under mild conditions. A deuterium-labeling experiment suggests that the enantioselectivity is controlled by both the styrene insertion and the C-C reductive elimination steps.
Enantioselective gold-catalyzed intermolecular [2+2] versus [4+2]-cycloadditions of 3-styrylindoles with N-allenamides: observation of interesting substituent effects
摘要:
环加成模式([2+2] vs. [4+2])可以通过对3-苯乙烯基吲哚的N-取代基进行简单修改而意外地切换。