A Facile Two-Step Synthesis of 2-Arylbenzofurans Based on the Selective Cross McMurry Couplings
摘要:
[GRAPHICS]A novel two-step synthesis of 2-arylbenzofurans has been developed. It involves a selective cross McMurry coupling of a salicylaldehyde or substituted salicylaldehyde with an aromatic aldehyde and a sequential oxidative cyclization of the resulting ortho-vinylphenols. Utilizing this synthetic protocol, a variety of 2-arylbenzofurans including cicerfuran (5) have been efficiently synthesized.
A Facile Two-Step Synthesis of 2-Arylbenzofurans Based on the Selective Cross McMurry Couplings
摘要:
[GRAPHICS]A novel two-step synthesis of 2-arylbenzofurans has been developed. It involves a selective cross McMurry coupling of a salicylaldehyde or substituted salicylaldehyde with an aromatic aldehyde and a sequential oxidative cyclization of the resulting ortho-vinylphenols. Utilizing this synthetic protocol, a variety of 2-arylbenzofurans including cicerfuran (5) have been efficiently synthesized.
Reactions of<i>o</i>-quinones with α-methyl- (or methylene) substituted phosphorus ylides. Synthesis of benzo[<i>b</i>]furan derivatives
作者:Daman R. Gautam、Konstantinos E. Litinas、Konstantina C. Fylaktakidou、Demetrios N. Nicolaides
DOI:10.1002/jhet.5570400301
日期:2003.5
In Wittig reaction of some α-methyl- and α-methylene-substituted phosphorus ylides with o-quinones, benzo[b]furan derivatives were obtained via the cyclization of the o-vinylphenols, initially formed from the tautomerization of the corresponding intermediate o-quinone methides.
在一些α-甲基和α-亚甲基取代的磷酰化物与邻醌的维蒂希反应中,通过邻乙烯基苯酚的环化反应获得了苯并[ b ]呋喃衍生物,该衍生物最初是由相应中间体邻-的互变异构形成的。醌甲基化物。