Generation and cycloaddition reactions of the 1,2,3-triazole analogue of o-quinodimethane
作者:George E. Mertzanos、Julia Stephanidou-Stephanatou、Constantinos A. Tsoleridis、Nicholas E. Alexandrou
DOI:10.1016/s0040-4039(00)60120-x
日期:1992.7
4,5-Dihydro-4,5-dimethylene-1-phenyl-1,2,3-triazole (4), the 1,2,3-triazole analogue ofo-quinodimethane, can be generated in situ from 4,5-bis(bromomethyl) derivative (3) by sodium iodide induced 1,4-elimination process. By trapping the 1,4-dimethylene-triazole with symmetrically and unsymmetrically substituted dienophiles the Diels-Alder cycloadducts were isolated in moderate to low yields; in the
4,5-二氢-4,5-二亚甲基-1-苯基-1,2,3-三唑(4)是邻-喹二甲烷的1,2,3-三唑类似物,可从4,5原位生成-双(溴甲基)衍生物(3)通过碘化钠诱导的1,4-消除过程。通过用对称和不对称取代的亲二烯体捕集1,4-二亚甲基三唑,Diels-Alder环加合物被分离出来,产率中等至低。在活化分子筛的存在下,收率明显提高。