The Secondary Amine/Nitric Oxide Complex Ion R<sub>2</sub>N[N(O)NO]<sup>-</sup> as Nucleophile and Leaving Group in S<sub>N</sub>Ar Reactions
作者:Joseph E. Saavedra、Aloka Srinivasan、Challice L. Bonifant、Jingxi Chu、Anna P. Shanklin、Judith L. Flippen-Anderson、William G. Rice、Jim A. Turpin、Keith M. Davies、Larry K. Keefer
DOI:10.1021/jo0016529
日期:2001.5.1
the cis arrangement of the oxygens were confirmed by X-ray crystallography. Displacement by various nucleophiles showed R(2)N[N(O)NO](-) to be a reasonably good leaving group, with rate constants for displacement by hydroxide, methoxide, and isopropylamine that were between those of chloride and fluoride in the S(N)Ar reactions we surveyed. The Meisenheimer intermediate could be spectrally observed. These