1,3-Carbothiolation of 4-(Trifluoromethyl)-p-Quinols: A New Access to Functionalized (Trifluoromethyl)arenes
摘要:
A new strategy, the 1,3-carbothiolation/aromatization, for the synthesis of functionalized (trifluoromethyl)arenes has been developed that enables the regioselective introduction of two different functional groups onto an "aromatic ring" in the meta-position to each other in a single step.
Tetrasubstituted furans were efficiently synthesized from Fe(OAc)2-catalyzed C–H/C–H cross-dehydrogenative-coupling (CDC) reactions of activated carbonyl methylenes with S,S-functionalized internal olefins, that is, α-oxo ketene dithioacetals and analogues, under oxidative conditions. β-Ketoesters, 1,3-dicarbonyls, β-keto nitrile, and amide derivatives were used as the coupling partners. The resultant
α-Trifluoromethyl-(indol-3-yl)methanols as trifluoromethylated C<sub>3</sub>1,3-dipoles: [3+2] cycloaddition for the synthesis of 1-(trifluoromethyl)-cyclopenta[b]indole alkaloids
作者:Jinhuan Dong、Ling Pan、Xianxiu Xu、Qun Liu
DOI:10.1039/c4cc05895j
日期:——
The first formal [3+2] cycloaddition using α-trifluoromethyl-(indol-3-yl)methanols as the trifluoromethylated C3 1,3-dipoles for the construction of the five-membered carbocycle of 1-trifluoromethylated cyclopenta[b]indole alkaloids is described. An unprecedented step-wise dehydrative alkenylation of α-trifluoromethyl alcohols was revealed as the crucial transformation.