Organohalide-catalyzed dehydrative O-alkylation between alcohols: a facile etherification method for aliphatic ether synthesis
作者:Qing Xu、Huamei Xie、Pingliang Chen、Lei Yu、Jianhui Chen、Xingen Hu
DOI:10.1039/c5gc00284b
日期:——
Organohalides effectively catalyzed dehydrative O-alkylation reactions between alcohols, providing selective, practical, green, and easily scalable homo- and cross-etherification methods for the preparation of useful symmetrical and unsymmetrical aliphatic ethers.
An Iron-Based Dehydration Catalyst for Selective Formation of Styrene
作者:Olaf Nachtigall、Andrew I. VanderWeide、William W. Brennessel、William D. Jones
DOI:10.1021/acscatal.1c03037
日期:2021.9.3
moderate reaction temperatures, A showed a high catalytic efficiency. It was found to selectively activate the benzylic alcohol group of 1-phenylethanol. This is challenging since the vinyl system of styrene is highly reactive. In contrast to most of the other dehydration processes, the use of a Brønsted acid was not necessary. Furthermore, mechanistic insights into this E1-type transformation and its
我们报告了 [Fe(OTf) 2 (FOX)] ( A )的合成和晶体结构。这种坚固的铁 (II) 配合物已成功用作均相催化剂,用于将 1-苯基乙醇脱水成苯乙烯。即使在低催化剂负载和中等反应温度下,A 也表现出高催化效率。发现它可以选择性地激活 1-苯基乙醇的苯甲醇基团。这是具有挑战性的,因为苯乙烯的乙烯基体系具有高反应性。与大多数其他脱水过程相比,不需要使用布朗斯台德酸。此外,还报告了对该 E 1型转化及其竞争性 S N 1 型副反应的机理见解。[铁( cHexOH)(OTf)(FOX)][OTf] ( B ),A的醇加合物,[Fe(H 2 O) 2 (FOX)][OTf] 2 ( C ),A的完全水合衍生物,和[μ-OFe(OTf)(FOX)} 2 ][OTf] 2 ( D ),A的双核氧化产物,也被表征和讨论。
Boyer's Reaction and Transetherification: Mechanism and New Perspectives
Boyer's reaction were analyzed using several simple, chiral, alcoholic substrates, a variable amount of BiBr3 and different solvents. Basic solvents inhibit the reaction, while cyclohexane works very well; thus, it was our choice for the present study. In contrast to previous works, BiBr3 behaves as a true catalyst, being not consumed during the reaction. Although poisoning of the catalyst occurs to some
LII.—The halogenation of optically active phenyl-methylcarbinol in the presence and in the absence of pyridine, by thionyl chloride and the chlorides and oxychloride of phosphorus
作者:Joseph Kenyon、Henry Phillips、Frank Martin、Hussey Taylor
DOI:10.1039/jr9310000382
日期:——
MATYJASZEWSKI K.; SIGWALT P., NOUV. J. CHIM., 10,(1986) N 6, 333-335