作者:Donald Craig、Neil J. Geach、Christopher J. Pearson、Alexandra M.Z. Slawin、Andrew J.P. White、David J. Williams
DOI:10.1016/0040-4020(95)00267-c
日期:1995.5
A series of N-substituted sulfoximidoyl-1,6,8-nonatrienes and 1,7,9-decatrienes were synthesised and subjected to thermal intramolecular Diels-Alder (IMDA) reactions to give diastereomeric mixtures of substituted bicyclo[4.3.0]nonanes and -[4.4.0]decanes. The reactions showed varying selectivities. Endo/exo selectivity was interpreted in terms of a combination of steric factors and the asynchronous
合成了一系列的N-取代的亚磺酰亚胺基-1,6,8-壬烯和1,7,9-癸二烯,并进行热分子内Diels-Alder(IMDA)反应,得到取代的双环[4.3.0]壬烷的非对映异构体混合物和-[4.4.0]癸烷。反应显示出不同的选择性。内/外选择性是根据空间因素和环加成反应的异步性质的组合来解释的。通过考虑二烯在构象扩展的乙烯基亚砜亚胺二烯亲和体的较少受阻面上的进攻,可以合理化非对面选择性。