Reactions of tetrachloropyridazine with aliphatic nitrogen nucleophiles
作者:Graham Pattison、Graham Sandford、Emma V.B. Wallace、Dmitry S. Yufit、Judith A.K. Howard、John A. Christopher、David D. Miller
DOI:10.1002/jhet.5570450114
日期:2008.1
Nucleophilic aromatic substitution reactions of tetrachloropyridazine with a series of aliphatic primary and secondary amines led selectively to products arising from replacement of chlorine at the 4-position in all cases. The structures of the products were unambiguously confirmed by X-ray crystallography. Substitution occurs at the most activated site para to ring nitrogen, despite the possible steric