Facile palladium-mediated substitution of chlorine in 2-chloroquinolines
作者:Marco A. Ciufolini、James W. Mitchell、Frank Roschangar
DOI:10.1016/0040-4039(96)01937-5
日期:1996.11
Unlike ordinary aryl chlorides, the title hererocycles participate readily in Castro-Stephens, Stille, Suzuki, and carbonylation reactions under the catalytic influence of Pd(0).
NH<sub>4</sub>I-mediated sp<sup>3</sup> C-H cross-dehydrogenative coupling of benzylamines with 2-methylquinoline for the synthesis of <i>E</i>-2-styrylquinolines
any metal catalyst, a simple and efficient method for the synthesis of E-2-styrylquinolines through sp3 C-Hcross-dehydrogenativecoupling of benzylamines with 2-methylquinolines mediated by NH4I under air is successfully developed. The oxidative olefination proceeded through deamination and sp3 C–H bond activation. A plausible mechanism is proposed for the construction of E-2-styrylquinolines.
azaheterocycle N-oxides with alkenes catalyzed by iodine under metal- and external oxidant-free reaction conditions has been developed. A variety of (E)-2-styrylazaheterocycles have been produced in moderate to excellent yields. The mechanistic exploration indicated that the N-oxide group played dual roles as both the directing group and an internal oxidant in this catalytic cycle.