Copper(II)-Mediated Cascade Oxidative C-C Coupling and Aromatization: Synthesis of 3-Hydroxyphenanthridinone Derivatives
作者:Yunfei Du、Kang Zhao、Qingzhen Yu、Nan Zhang、Yang Tang、Hang Lu、Jianhui Huang、Songqing Wang
DOI:10.1055/s-0032-1316542
日期:2012.8
Abstract A novel copper(II) acetate mediated synthesis of 3-hydroxyphenanthridin-6(5H)-ones from N-(3-oxocyclohex-1-enyl)benzamides was developed. The process is postulated to involve an intramolecular oxidative C(sp2)–C(sp3) bond formation followed by dehydrogenative aromatization. A novel copper(II) acetate mediated synthesis of 3-hydroxyphenanthridin-6(5H)-ones from N-(3-oxocyclohex-1-enyl)benzamides
A novel Diels–Alder (DA) reaction with 4-nitro-1(2H)-isoquinolones acting as the dienophile afforded 5(6H)-phenanthridone derivatives. The DA reaction of 4-nitro-1(2H)-isoquinolone with 1-methoxy-1,3-butadiene gave biologically active 5(6H)-phenanthridone possessing in a high yield. Regioselectivity of 4-nitro-1(2H)-isoquinolones with 1-methoxy-3-silyloxy-1,3-butadiene was calculated using molecular orbital (MO) calculations.