Perkin communications. A new sequence for the Cα-alkylation of 4,5-dihydroimidazoles
摘要:
The C-alkylation of 1-benzyl-2-(ethoxycarbonylmethylene)-2,3,4,5-tetrahydroimidazole with halogeno- and dihalogeno-alkanes is described; subsequent removal of the ethoxycarbonyl group provides a new route to 2-alkyl-4,5-dihydroimidazoles. 1,3-Dihalogenoalkanes afford imidazo[1,2-a]pyridines.
Perkin communications. A new sequence for the C<sup>α</sup>-alkylation of 4,5-dihydroimidazoles
作者:Raymond C. F. Jones、Simon C. Hirst、Ian Turner
DOI:10.1039/p19910000953
日期:——
The C-alkylation of 1-benzyl-2-(ethoxycarbonylmethylene)-2,3,4,5-tetrahydroimidazole with halogeno- and dihalogeno-alkanes is described; subsequent removal of the ethoxycarbonyl group provides a new route to 2-alkyl-4,5-dihydroimidazoles. 1,3-Dihalogenoalkanes afford imidazo[1,2-a]pyridines.
Alkylation of an imidazolidine enaminoester: A new sequence for the Cα-alkylation of 4,5-dihydroimidazoles
作者:Raymond C.F Jones、Pravin Patel、Simon C Hirst、Ian Turner
DOI:10.1016/s0040-4020(97)00752-7
日期:1997.8
1-Benzyl-2-(ethoxycarbonylmethylene)-2,3 undergoes preferred C-alkylation with halogenoalkanes, dihalogenoalkanes and epoxides: subsequent removal of of the ethoxycarbonyl group provides a new route to 2-alkyl-4,5-dihydroimidazoles. 1,3-Dihalogenoalkanes afford imidazo[1,2-a]pyridines via C,N-dialkylation. (C) 1997 Elsevier Science Ltd.