1,3-Dipolar cycloaddition of 6,7-dialkoxy-3,4-dihydroisoquinolinium salts to dipolarophiles of azomethin- and alkene type have been investigated. The regioselectivity of the reactions rationalized on the basis of the perturbation theory, using CNDO/2 and CNDO/S approximations. Good agreement between the calculated and experimental results was achieved only when a distance of 3 Å in the transition state
已经研究了将6,7-二烷氧基-3,4-二氢
异喹啉鎓盐的1,3-偶极环加成到偶氮甲辛和烯烃类型的偶极亲和剂中。基于扰动理论,使用CNDO / 2和CNDO / S近似合理化了反应的区域选择性。仅当在分子之间的过渡态中选择3Å的距离时,才能在计算结果和实验结果之间取得良好的一致性。环加合物的外/内比率也已经合理化。