Nouveau dérivés de l'hydroxylamine, leur procédé de préparation, leur application comme facteur de croissance des végétaux et les compositions les renfermant
申请人:ROUSSEL-UCLAF
公开号:EP0119892B1
公开(公告)日:1986-08-13
Eliminations from (E)-2,4-Dinitrobenzaldehyde O-Aryloximes Promoted by R<sub>3</sub>N in MeCN. Effects of β-Aryl Group and Base-Solvent on the Nitrile-Forming Transition-State
作者:Bong-Rae Cho、Eun-Mi Ryu、Sang-Yong Pyun
DOI:10.5012/bkcs.2012.33.9.2976
日期:2012.9.20
the product by astronger base in the reaction coordinate diagram. On theother hand, when the leaving group was changed from 2,4-dinitrophenoxide to picrate, the ρ value decreased but the βvalue increased. The results are in conflict with the predic-tion of the reaction coordinate diagram because both ρ and βvalues should be decreased with a better leaving group. Theunusual changes in the transition-state
Electrophilic <i>N</i>-Amination of Two Quinazoline-2,4-diones Using Substituted (Nitrophenyl)hydroxylamines
作者:David C. Boyles、Timothy T. Curran、Parlett、Mark Davis、Frank Mauro
DOI:10.1021/op010239f
日期:2002.5.1
The preparation of a few (nitrophenyl)hydroxylamines and reaction with two quinazoline-2,4-diones is described. The electrophilic aminating agents were assessed in terms of yield for the N-amination of two quinazoline-2,4-diones and safety considerations for rapid scale-up. For the amination of the described system, the best yield and the highest onset temperature were found in the same aminating agent