Surface-Mediated Reactions. 9. Selective Oxidation of Primary and Secondary Amines to Hydroxylamines<sup>1</sup>
作者:John D. Fields、Paul J. Kropp
DOI:10.1021/jo0002083
日期:2000.9.1
OXONE over silica gel or, in some cases, alumina has been found to oxidize the primary and secondaryamines 3 selectively to the corresponding hydroxylamines 4, in either the presence or absence of a solvent. Treatment of Boc-protected L-lysine (6) under the latter conditions afforded hydroxylamine 7 in excellent yield. The trialkylamine 1a and pyridine (1b), in which selectivity is not an issue, were
In-situ polymerization of monoethylenically unsaturated monomers with secondary amines
申请人:——
公开号:US20040122270A1
公开(公告)日:2004-06-24
A process for the preparation of any of well-defined homopolymers, random and block copolymers is disclosed. The process that entails forming a mixture of monomers, a hindered secondary amine and an oxidizing agent is characterized in the absence of any additional free-radical initiator.
activation energies of the new alkoxyamines are described. Furthermore, 1H NMR alkoxyamine decomposition studies are presented. These kinetic experiments are used for the discussion of the polymerization results. Furthermore, the X-ray structure of a Hawker-Braslau type nitroxide is presented. X-ray data and ESR data are used to explain the high stability of these nitroxides.
描述了用于硝基氧介导的活性自由基聚合反应的三种新的位阻霍克-布拉斯劳型烷氧基胺的合成。有效的聚合反应可以在105°C下进行。用烷氧基胺11,即使在90℃下,丙烯酸正丁酯和苯乙烯的受控聚合也是可能的。可以使用烷氧基胺11以受控方式制备AA和AB二嵌段共聚物。描述了确定新烷氧基胺的C-O键活化能的动力学EPR实验。此外,1提出了1 H NMR烷氧基胺的分解研究。这些动力学实验用于讨论聚合结果。此外,提出了霍克-布拉斯劳型氮氧化物的X射线结构。X射线数据和ESR数据用于解释这些氮氧化物的高稳定性。
Synthesis of di--alkylamines
作者:E.J. Corey、Andrew W. Gross
DOI:10.1016/s0040-4039(00)99919-2
日期:1984.1
Di--alkylamines can be synthesized efficiently by a three-step process: (1) oxidation of a -alkylamine to a -alkylnitroso compound with peracetic acid in ethyl acetate (2) conversion of the -alkylnitroso compound to a tri--alkylhydroxylamine by successive trapping of two -butyl radicals and (3) sodium naphthalide reduction to the di--alkylamine.
Polymerizable compositions containing alkoxyamine compounds derived from nitroso- or nitrone compounds
申请人:——
公开号:US20010039315A1
公开(公告)日:2001-11-08
A polymerizable composition, comprising
a) at least one ethylenically unsaturated monomer or oligomer, and
b) an initiator compound of formula (I)
1
wherein n is 0 or 1.
The compounds of formula (I) are prepared from a free radical
2
and a compound of formula R
10
NO or
3
Further aspects of the present invention are a process for polymerizing ethylenically unsaturated monomers, novel initiator compounds and their use for polymerization, intermediate compounds and also the polymer or copolymer produced by this process.