N1‐(2‐chlorocyclohexyl) amidine 2a and N‐(2‐chlorocyclohexyl)acetamide (3) via the competitive addition of acetonitrile and N‐chloro‐N‐tosylamino anion to cyclohexenechloronium ion. This reaction can be catalyzed by Cu(OAc)2, primarily affording 2a. Furthermore, the resulting 2a can be cyclized to benzimidazol 14a in good yield by treating with KOH in dioxane.
A novel cationic Br initiated one-pot imidazoline synthesis has been developed using olefin, nitrile, amine, and N-bromosuccinimide. The olefinic substrates and the nitrile partners can be flexibly varied to achieve a range of imidazoline derivatives.
A One-Pot β-Chloro-N′-tosylamidination of Olefins with Chloramine-T
作者:Sundarababu Baskaran、Annamalai Murali、Suman Sen
DOI:10.1055/s-0030-1260021
日期:2011.6
A new method for the direct synthesis of β-chloro-N′-tosylamidines from olefins using chloramine-T and trifluoromethanesulfonic acid is described.