Indium Triiodide Catalyzed Direct Hydroallylation of Esters
作者:Yoshihiro Nishimoto、Yoshihiro Inamoto、Takahiro Saito、Makoto Yasuda、Akio Baba
DOI:10.1002/ejoc.201000475
日期:——
InI 3 -catalyzed hydroallylation of esters by using hydro-and allysilanes under mild conditions has been accomplished. Many significant groups such as alkenyl, alkynyl, cyano, and nitro ones survive under these conditions. This reaction system provided routes to both homoallylic alcohols and ethers, in which either elimination of the alkoxy moiety or of the carbonyl oxygen atom could be freely selected
通过在温和条件下使用氢化硅烷和烯丙基硅烷完成了 InI 3 催化的酯的氢化烯丙基化。许多重要的基团,如链烯基、炔基、氰基和硝基基团在这些条件下仍然存在。该反应体系为高烯丙醇和醚提供了途径,其中烷氧基部分或羰基氧原子的消除可以通过改变烷氧基部分和氢硅烷上的取代基自由选择。此外,内酯的氢烯丙基化发生在不开环的情况下,以高产率生产所需的环醚。
[EN] FLAME RETARDED STYRENIC POLYMER FOAMS AND FOAM PRECURSORS<br/>[FR] MOUSSES POLYMÈRES STYRÉNIQUES IGNIFUGÉEET PRÉCURSEURS DES MOUSSES
申请人:ALBEMARLE CORP
公开号:WO2008106334A2
公开(公告)日:2008-09-04
[EN] This invention provides styrenic polymer foams, especially expanded and/or extruded styrenic polymer foams, which are flame retarded by use of one or more flame retardants. These flame retardants are (i) at least one compound having the formula: where R is hydrogen, a methyl group, a linear or branched substituted or unsubstituted aliphatic group having from two to about six carbon atoms, or a halogenated linear or branched substituted or unsubstituted aliphatic group having from two to about six carbon atoms, (ii) a compound having the formula: or (iii) a combination of (i) and (ii). [FR] L'invention concerne des mousses polymères styréniques, en particulier des mousses polymères styréniques expansées et/ou extrudées, qui sont ignifugées à l'aide d'un ou de plusieurs additifs d'ignifugation. Ces additifs sont: i) au moins un composé de la formule, dans laquelle R représente hydrogène, un groupe méthyle, un groupe aliphatique substitué ou non substitué, linéaire ou ramifié ayant de deux à environ six atomes de carbone, ou un groupe aliphatique substitué ou non substitué, linéaire ou ramifié, halogéné ayant de deux à environ six atomes de carbone, (ii) un composé de la formule, ou (iii) une combinaison de (i) et (ii).
CYCLOHEXENECARBOXYLATE ESTER HYDROLASE, AND MUTANT, CODING GENE, EXPRESSION VECTOR, RECOMBINANT BACTERIUM AND USE THEREOF
申请人:JIANGNAN UNIVERSITY
公开号:US20220396781A1
公开(公告)日:2022-12-15
The present invention discloses a cyclohexenecarboxylate ester hydrolase, and a mutant, a coding gene, an expression vector, recombinant bacterium and use thereof. The cyclohexenecarboxylate ester hydrolase AcEst1 and its mutant of the present invention have the function of enantioselectively resolving methyl 3-cyclohexene-1-carboxylate with high efficiency to prepare optically active (S)-3-cyclohexene-1-carboxylic acid. When the substrate concentration is as high as 2000 mM (about 280 g/L), the optical purity of the product is higher than 99%, and the substrate/catalyst is as high as 3500 g/g. As compared with other preparation methods, the product prepared by the method of the present invention has high concentration and high optical purity, the catalytic efficiency is high, the reaction conditions are mild. Furthermore, the method is environmentally friendly, simple in operation and easy for industrial scale-up, thus has a good prospect of application in industry.