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
Examination of Pyridazine as a Possible Scaffold for Nucleophilic Catalysis
作者:Airi Tamaki、Satoshi Kojima、Yohsuke Yamamoto
DOI:10.1021/acs.joc.6b00630
日期:2016.10.7
with amino groups positioned para to each aromatic ring nitrogen and fixed in six-membered rings were prepared. The representative symmetric amino N-Et derivative was found to slightly exceed DMAP in catalytic activity in the acetylation reaction of a tertiary alcohol in C6D6. Nucleophilicity eclipsing that of DMAP was established in competitive reactions using phenacyl bromide as the electrophile
制备具有位于每个芳族环氮对侧并固定在六元环中的氨基的哒嗪。发现在C 6 D 6中叔醇的乙酰化反应中,代表性的对称氨基N- Et衍生物的催化活性略高于DMAP 。在以苯甲酰溴为亲电试剂的竞争反应中,亲核试剂的亲和力超过了DMAP,非对称N -Et衍生物具有更高的亲核亲和性。