A new catalytic process for allyl ester cleavage has been developed by using a robust cationic CpRu(IV) π-allyl complex of 2-quinolinecarboxylic acid that can be stored for over six months in air without any loss of catalytic activity. The deprotection of various alcohols and acids can be attained simply with high reactivity and chemoselectivity under mild conditions. Furthermore, with continuous removal
ASYMMETRIC ORGANIC PEROXIDE, CROSSLINKING AGENT COMPRISING THE SAME, AND METHOD OF CROSSLINKING WITH THE SAME
申请人:NOF CORPORATION
公开号:EP1233014A1
公开(公告)日:2002-08-21
A crosslinking agent comprising an asymmetry organic peroxide having at least one structure unit of (substituted)benzoylcarbonyloxy group represented by the following formula (1) in the molecule thereof.
Environmentally friendly crosslinking agents and crosslinked silicone rubber moldings are provided thereby.
Specifically, useful crosslinking agents and crosslinking processes for silicone rubber are provided.
[EN] (METH)ACRYLOXY-CONTAINING TRISILOXANE, SILOXANE-CONTAINING POLYMERS AND BIOMEDICAL DEVICES THEREFROM<br/>[FR] TRISILOXANE CONTENANT UN (MÉTH)ACRYLOXY, POLYMÈRES CONTENANT UN SILOXANE ET DISPOSITIFS BIOMÉDICAUX LES CONTENANT
申请人:MOMENTIVE PERFORMANCE MAT INC
公开号:WO2014123956A1
公开(公告)日:2014-08-14
There is provided a trisiloxane having a 3-(meth)acryloxy-substituted (hydroxylcyclohexyl)ethyl group, useful in making water absorbing silicone-hydrogel films for biomedical devices, such as contact lens, and a process for producing these monomers. This invention also provides for copolymers made from the trisiloxane having a 3-(meth)acryloxy-substituted (hydroxylcyclohexyl)ethyl group described herein.
Synthesis of Diverse Aromatic Oxophosphorus Compounds by the Michaelis–Arbuzov-type Reaction of Arynes
作者:Suguru Yoshida、Takamitsu Hosoya
DOI:10.1246/cl.130116
日期:2013.6.5
Arynes, generated in situ from o-(trimethylsilyl)aryl triflates by treatment with a fluoride, have been shown to react efficiently with various alkoxyphosphines via a mechanism similar to the Michaelis–Arbuzov reaction. Diverse aromatic oxophosphorus compounds, including derivatives with an ortho-ester function, have become easily available from a common aryne precursor by this method.
Wet and Dry Processes for the Selective Transformation of Phosphonates to Phosphonic Acids Catalyzed by Brønsted Acids
作者:Chunya Li、Yuta Saga、Shun-ya Onozawa、Shu Kobayashi、Kazuhiko Sato、Norihisa Fukaya、Li-Biao Han
DOI:10.1021/acs.joc.0c00550
日期:2020.11.20
substituents of the phosphonateesters, the conversion to the corresponding phosphonic acids can be achieved under milder conditions in the absence of water (the dry process). Thus, the conversion of dibenzyl phosphonates to the corresponding phosphonic acids took place smoothly at 80 °C in toluene or benzene in high yields. Moreover, selective conversion of benzyl phosphonates RP(O)(OR′)(OBn) to the