Synthesis of 2-Alkoxy-5-methylenetetrahydropyrans: A Regioselective Ruthenium-Catalyzed C−C Coupling Reaction of Prop-2-yn-1-ols with Allyl Alcohol
作者:Sylvie Dérien、Loïc Ropartz、Jacques Le Paih、Pierre H. Dixneuf
DOI:10.1021/jo982300t
日期:1999.5.1
The carbon-carbon coupling of prop-2-yn-1-ols with allylalcohol is achieved in the presence of the ruthenium(II) catalyst RuCl(cod)(C(5)Me(5)). The coupling reaction is highly regioselective and leads to the HOCR(2)C(=CH(2))CH(2)CH(2)CHO isomer and, after cyclization, to either 2-hydroxy- or 2-alkoxy-5-methylenetetrahydropyrans, at room temperature or at 80 degrees C, respectively. It is used for
Amphoteric Allenylidene Ruthenium Complexes and the First Dinuclear Ruthenium Species with a Bis-alkenyl Carbyne Bridging Ligand
作者:Stéphane Rigaut、Daniel Touchard、Pierre H. Dixneuf
DOI:10.1021/om0304098
日期:2003.9.1
Cationic ruthenium(II) allenylidenes trans-[Cl(dppe)2RuCCC(CH3)R]BF4 (R = Ph, CH3) can be deprotonated to generate neutral alkenyl acetylide metal trans-[Cl(dppe)2Ru−C⋮C−C(CH2)R] or protonated with HBF4·Et2O to lead to dicationic ruthenium(II) carbynes trans-[Cl(dppe)2Ru⋮C−CHC(CH3)R](BF4)2. The latter reaction was applied to transform a conjugated bis-allenylidene bridged diruthenium complex, trans-
阳离子钌(II)亚烯基反式-[Cl(dppe)2 Ru C C C(CH 3)R] BF 4(R = Ph,CH 3)可以去质子化,生成中性烯基乙炔金属反式-[Cl(dppe)2 Ru-C⋮C-C(CH 2)R]或用HBF 4 ·Et 2 O质子化生成顺式钌(II)卡宾,反式-[Cl(dppe)2 Ru⋮C-CH C(CH 3) R](BF 4)2。后者反应用于转化共轭双亚烯基桥连的钌络合物,反式-[Cl(dppe)2 Ru C C C(CH 3)-p -C 6 H 4-(CH 3)C C C Ru(dppe) )2 Cl](BF 4)2,转化为第一个双烯基卡宾炔钌物种,反式-[Cl(dppe)2 Ru⋮C-CH C(CH 3)-p -C 6 H 4-(CH 3)C HC-C⋮Ru(dppe)2Cl](BF 4)4。
Polycyclocarbonate compounds and polymers formed therefrom
申请人:Valspar Sourcing, Inc.
公开号:US10000461B2
公开(公告)日:2018-06-19
Polycyclocarbonate compounds and upgraded molecular weight polymers made from such compounds are provided. The polymers have particular utility in coating compositions, especially for use on food and beverage contact substrates that are formed into or will be formed into containers or container components.
Polycyclocarbonate compounds and polymers and compositions formed therefrom
申请人:The Sherwin-Williams Company
公开号:US10717897B2
公开(公告)日:2020-07-21
Polycyclocarbonate compounds and upgraded molecular weight polymers made from such compounds are provided. The polymers have particular utility in coating compositions, especially for use on food and beverage contact substrates that are formed into or will be formed into containers or container components.