Ni-Catalyzed Intramolecular Cycloaddition of Methylenecyclopropanes to Alkynes
摘要:
Ni-catalyzed intramolecular cycloaddition of methylenecyclopropanes (MCPs) to arkylalkynes via proximal bond cleavage is reported. The reaction provides a facile route for the preparation of cyclopenta[a]indene derivatives.
Synthesis of Polysubstituted Polycyclic Aromatic Hydrocarbons by Gold-Catalyzed Cyclization–Oxidation of Alkylidenecyclopropane-Containing 1,5-Enynes
作者:Liu-Zhu Yu、Yin Wei、Min Shi
DOI:10.1021/acscatal.7b00784
日期:2017.7.7
ne-containing 1,5-enynes with 3,5-dibromo-pyridine N-oxide via a noncarbene model was developed, providing a range of synthetically valuable and useful arylacetaldehyde derivatives in moderate to good yields without oxidation of alkynes. Moreover, the corresponding aldehydes can be further transformed into polycyclicaromatichydrocarbons in the presence of a catalytic amount of Lewis acid In(OTf)3