Synthesis of Highly Labile SG1-Based Alkoxyamines under Photochemical Conditions
摘要:
Highly labile SG1-based alkoxyamines were synthesized using the photodecomposition of both azo compounds and dithiocarbamates. The former method was a straightforward procedure to obtain the alkoxyamines, but a high [azo]/[nitroxide] ratio is needed. The latter method required only a stoichiometric amount of dithiocarbamate and allowed the recovery of the disulfide after irradiation. This enabled combination of the two methods in a process where only 0.75 equiv of azo compound is needed and where sulfurous compounds acted only as intermediates.
Process for preparing azoiminoethers and azocarboxylic acid esters and novel azocboxylic acid mixed esters
申请人:Atofina
公开号:US06407219B1
公开(公告)日:2002-06-18
The invention concerns a method for preparing an azoiminoether hydrochloride which consists in reacting an azonitrile with an alcohol and hydrochloric acid in an aromatic solvent, wherein the molar ratio R=HCl/azonitrile is >2 when the alcohol is methanol and >3 when the alcohol is ethanol or a higher alcohol. The invention also concerns a method for preparing an azocarboxylic acid ester which consists in the synthesis of an azoiminoether hydrochloride by the inventive method and, hydrolysis in the presence of the resulting azoiminoether hydrochloride. Said methods enable to obtain liquid composition of azocarboxylic acid esters. The invention further concerns mixed azoiminoether salts of formula (II′). The invention also concerns mixed azoiminocarboxylic acid esters corresponding to the formula (III′).
The oxidation of Ni(ii) N-confused porphyrins (NCPs) with azo radical initiators and an unexpected intramolecular nucleophilic substitution reaction via a proposed Ni(iii) NCP intermediate
The oxidation of Ni(II) N-confused porphyrins (NCPs) with azo radical initiators resulted in an unexpected intramolecular nucleophilicsubstitution reaction via a proposed Ni(III) NCP intermediate, which could be detected by HRMS.
COMPOUNDS CARRYING NITROGEN-CONTAINING BINDING GROUPS
申请人:Arkema France
公开号:US20190315695A1
公开(公告)日:2019-10-17
The invention relates to a compound of formula (I), wherein: A1 and A
2
represent, independently of one another, a binding group comprising at least one nitrogen atom; Q
1
and Q
2
represent, independently of one another, a linkage group; and x is an integer between 2 and 6, preferably between 3 and 6. The invention also relates to a rubber composition comprising said compound.
Dental composites based on X-ray-opaque mixed oxides prepared by flame spraying
申请人:Burtscher Peter
公开号:US20050176843A1
公开(公告)日:2005-08-11
The present invention relates to dental composites comprising at least one nanoparticulate mixed oxide (a) of SiO
2
with X-ray-opaque metal oxides of one or more elements selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu which has been prepared by flame spraying.