On the stereochemical outcome of the reaction between (–)-chorismic acid and diazomethane: absolute proof of stereochemistry of the major pyrazoline by X-ray crystallography of a cyclopropane based derivative
作者:Harry Adams、Neil A. Bailey、Martyn Frederickson、Edwin Haslam、Gareth M. Davies、David A. Jude
DOI:10.1039/p19960001531
日期:——
afforded a pair of cyclopropane derivatives with stereochemistry that could not be confidently assigned using data from coupling constants alone. NOE data allowed a more confident assignment of the stereochemistry of the two cyclopropanes; the β-cyclopropyl derivative was saponified and hydrolysed to yield a bicyclo[4.1.0]hept-2-ene-1-carboxylic acid derivative that was unequivocally shown to possess (1S,4R