Synthesis of Substituted Isoquinolines by Electrophilic Cyclization of Iminoalkynes
作者:Qinhua Huang、Jack A. Hunter、Richard C. Larock
DOI:10.1021/jo020020e
日期:2002.5.1
pyridinecarbaldehydes have been cyclized under very mild reaction conditions in the presence of I(2), ICl, PhSeCl, PhSCl, and p-O(2)NC(6)H(4)SCl to give the corresponding halogen-, selenium-, and sulfur-containing disubstituted isoquinolines and naphthyridines, respectively. This methodology accommodates a variety of iminoalkynes and affords the anticipated heterocycles in moderate to excellent yields. Monosubstituted
邻-(1-炔基)苯甲醛和类似的吡啶甲醛的叔丁基亚胺已在I(2),ICl,PhSeCl,PhSCl和pO(2)NC(6)H( 4)SCl分别得到相应的含卤素,硒和硫的二取代异喹啉和萘啶。该方法可容纳各种亚氨基炔,并以中等至极好的收率提供预期的杂环。通过这些相同的亚氨基炔的金属催化的闭环合成了单取代的异喹啉和萘啶。银催化的闭环在50摄氏度下将芳基,烯基和烷基取代的亚氨基炔烃环化方面非常有效。