Etude DSC de la réaction de l'hydroperoxyde de l'hydroperoxyde de t-butyle avec des dérivés thioorganostanniques
摘要:
Resume La 分解 de l'hydroperoxyde de l'hydroperoxyde de l't-butyle par les 衍生出 thioorganstanniques a ete etudiee en faisant appel a la DSC en programmation de temperature。Il a insi ete montre que cette 降解 fait intervenir 不同的反应连续等 que 某些组成 thioorganstanniques genendrent des especes 能够 de catalyser la 分解 de l'hydroperoxyde de l'hydroperoxyde de t-butyle。
[EN] PROCESS FOR PREPARING ISOCYANATE COMPOUND<br/>[FR] PROCÉDÉ DE PRÉPARATION D'UN COMPOSÉ ISOCYANATE
申请人:BASF SE
公开号:WO2016177761A1
公开(公告)日:2016-11-10
The present invention relates to a process for the preparation of an isocyanate compound comprising the steps of: a) Reacting an amine compound A having at least one primary amino group with CO2 and an organotin compound S having at least one radical OR3 attached to the tin atom of the organotin compound, wherein R3 is a C-bound organic radical having from 1 to 30 carbon atoms, wherein 1, 2 or 3 carbon atoms may be replaced by oxygen or nitrogen, to convert at least one of the primary amino groups in the amine compound A into a carbamate group, thereby obtaining a carbamate compound C; b) cleavage of the carbamate groups in the carbamate compound C obtained in step a) to form the isocyanate compound and an alcohol R3OH, without separation of the tin compound formed in step a); c) obtaining the isocyanate compound from the reaction mixture of step b).
A supramolecularly templated catenane initiator and a controlled ring expansion strategy
作者:Peng-Fei Cao、Ajaykumar Bunha、Joey Mangadlao、Mary Jane Felipe、Katrina Irene Mongcopa、Rigoberto Advincula
DOI:10.1039/c2cc35588d
日期:——
We report the first synthesis of a catenated polymer via a ring-expansion strategy, which is based on a supramolecularly templated initiator. The high yielding synthesis and simple isolation method will enable the investigation and development of this unique polymer system for further applications.
A synthetic strategy is reported for the production of a trefoil knotted polymer from a copper(I)‐templated helical knot precursor through ringexpansion. The expected changes in the properties of the knotted polymer compared to a linear analogue, for example, reduced hydrodynamic radius and lower intrinsic viscosity, together with an atomic force microscopy (AFM) image of individual molecular knots
Mixture for recovery utilization or transfer of carbon dioxide
申请人:Miyake Nobuhisa
公开号:US08362289B2
公开(公告)日:2013-01-29
It is an object of the present invention to provide a mixture for recovery utilization or transfer of carbon dioxide gas. According to the present invention, disclosed is a mixture containing carbon dioxide and an alkyltin alkoxide composition containing carbon dioxide complex of an alkyltin alkoxide, the mixture having a composition with a specified ratio.
with methanol to give the tetrabutyl(dimethoxy)stannoxane dimer (4). The presence of 2,2-dimethoxypropane under a CO2 pressure accelerates the reaction resulting in nearly quantitative yield. Complex 4 exhibits catalytic activity as high as that of Bu2Sn(OMe)2}2 (1) in the dimethyl carbonate (DMC) synthesis from CO2 and methanol. These results indicate that the conversion of 3 to 4 occurs under catalytic