Autoxidative Annulation Cascade of the α-Cyano β-TMS-capped Alkynyl Cycloalkanone System
摘要:
The autoxidative annulation cascade promoted by an a.-cyano beta-TMS-capped alkynyl cycloalkanone system under catalysis with pyridine in one oxygen atmosphere has proven to be highly viable. On the basis of this newly developed protocol, a variety of highly functionalized bicyclic frameworks can be effectively constructed.
Palladium(ii) acetate mediated oxidative cyclization of ω-unsaturated α-cyano ketones for facile construction of methylenecyclohexane ring system
作者:Min-Tsang Hsieh、Kak-Shan Shia、Hsing-Jang Liu、Sheng-Chu Kuo
DOI:10.1039/c2ob25161b
日期:——
construction of the structurally attractive methylenecyclohexane ring was developed through a convenient 1,4-addition of 4-pentenylmagnesium bromide to 2-cyano-2-cycloalkenones followed by a Pd(II)-mediated oxidative cyclization of the resulting ω-unsaturated α-cyano ketones. Based on this newly developed protocol, polycyclic adducts bearing various ring sizes and substitutions can be prepared in moderate to