Insertion of Pyridine into the Calcium Allyl Bond: Regioselective 1,4-Dihydropyridine Formation and CH Bond Activation
作者:Phillip Jochmann、Thomas S. Dols、Thomas P. Spaniol、Lionel Perrin、Laurent Maron、Jun Okuda
DOI:10.1002/anie.201003704
日期:2010.10.11
The remarkable balance between nucleophilicity and basicity that is found for bis(allyl)calcium has not been previously reported for organolithium and organomagnesium reagents. Pyridine undergoes regioselective 1,4‐insertion into the calcium allyl bond of bis(allyl)calcium. The resulting calcium 4‐allyl‐1,4‐dihydropyridyl compound can be readily converted into the N‐protected 1,4‐dihydropyridine derivatives
对于双(烯丙基)钙发现的亲核性和碱性之间的显着平衡以前尚未报道过有机锂和有机镁试剂。吡啶在双(烯丙基)钙的钙烯丙基键中进行区域选择性的1,4插入。生成的4-烯丙基-1,4-二氢吡啶基钙化合物可以轻松转化为N-保护的1,4-二氢吡啶衍生物。