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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 18, Number 12
BKCSDE 18(12)
December 20, 1997 

 
Title
Mechanism of Elimination from (E)-2,4-Dinitrobenzaldehyde O-pivaloyloxime Promoted by R2NH/R2NH2+ buffer in 70% MeCN(aq)
Author
Bong Rae Cho*, Nam Soon Cho, Hak Suk Chung, Ki Nam Son, Man So Han, Sang Yong Pyun
Keywords
Abstract
Elimination reactions of (E)-2,4-dinitrobenzaldehyde O-pivaloyloxime promoted by R2NH/R2NH2+ buffer in 70% MeCN(aq) have been studied kinetically. The reaction exhibited second order kinetics and general base catalysis with Bronsted β=0.45. The Hammett ρ value decreased from 2.3 to 1.6 as the base-solvent system was changed from DBU in MeCN to R2NH/R2NH2+ buffer in 70% MeCN(aq). From these results an E2 mechanism is proposed.
Page
1301 - 1304
Full Text
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