RADICAL CYCLISATION BASED APPROACH TO LIGNANS. SYNTHESIS OF 4-ARYLMETHYLDIHYDROFURAN-2-ONES
作者:A. Srikrishna、S. Danieldoss
DOI:10.1081/scc-100104837
日期:2001.1
Bromoacetalisation of the cinnamyl alcohols 7a–d, obtained from the corresponding benzaldehydes, generated the bromoacetals 10a–d. The 5-exo trig radical cyclisation of the bromoacetals 10a–d followed by one step hydrolysis-oxidation of the resulting cyclic acetals 11a–d furnished the title compounds 6a–d, respectively, well-established intermediates of a variety of lignans.
从相应的苯甲醛中获得的肉桂醇 7a-d 的溴缩醛化生成了溴缩醛 10a-d。溴缩醛 10a-d 的 5-exo trig 自由基环化,然后对所得环状缩醛 11a-d 进行一步水解-氧化,分别提供了标题化合物 6a-d,它们是各种木脂素的成熟中间体。