作者:László Juhász、László Szilágyi、Sándor Antus、Júlia Visy、Ferenc Zsila、Miklós Simonyi
DOI:10.1016/s0040-4020(02)00360-5
日期:2002.5
Flavanone (1) on oxidation with iodobenzene diacetate (PIDA) in the presence of sulfuric acid in trimethyl orthoformate (TMOF) undergoes a stereospecific ring contraction by an aryl shift to result in trans methyl 2-aryl-2,3-dihydrobenzo[b]furan-3-carboxylate (4a) as a major product. The mechanism of this transformation has been discussed on the basis of NMR, CD and chiral HPLC evidence.
在硫酸存在下,在原甲酸三甲酯(TMOF)中用碘代二乙酸二苯酯(PIDA)氧化黄烷酮(1)时,由于芳基移位而发生立体有择的环收缩,从而生成反甲基2-芳基-2,3-二氢苯并[ b ]呋喃-3-羧酸盐(4a)为主要产品。已经基于NMR,CD和手性HPLC证据讨论了这种转化的机理。