Ruthenium-catalyzed isomerization of homoallylic alcohols in water
摘要:
Through the catalysts of RuCl2(PPh3)(3), the functional groups of homoallylic alcohols are repositioned to give allylic alcohols with controlled regioselectivity. The reaction proceeds most efficiently in an aqueous media. The selectivity in product formation is affected by the reaction temperature and the amount of the catalyst being used. A higher reaction temperature and the use of a smaller amount of the catalyst are preferable for the formation of allylic alcohols. The reaction process was postulated as a tandem olefin migration-allylic rearrangement. Under the same reaction conditions, the functional groups of allylic alcohols undergo allylic rearrangements. (C) 1998 Elsevier Science Ltd. All rights reserved.
Rhodium-Catalyzed Reductive Allylation of Conjugated Aldehydes with Allyl Acetate
摘要:
Reductive allylation of aryl and alkenyl aldehydes with allyl acetate catalyzed by the ionic diamine carbonyl rhodium complex, [Rh(TMEDA)(CO)(2)][RhCl(2)(CO)(2)], under a carbon monoxide atmosphere afforded the corresponding homoallylic alcohols in good isolated yields.
A novel concept of one-pot sequential doublenucleophilicattacks using two different nucleophiles to a molecule having identical functionalities was established via an indium-employed allylation strategy involving an HOAc quenching after the first allylation.
Zinc/Bismuth-Mediated Allylation Reaction of Biomass Feedstocks: Synthesis of Furanic Diols
作者:Mukund P. Sibi、Soumen Biswas、Prakash Kannaboina
DOI:10.1055/a-2241-6966
日期:——
Biomass-based diols have been synthesized by a Zn/Bi-mediated Barbier-type of reaction from furanic aldehydes and allyl halides to access allylated diols. The allylated diols can be readily converted into alkylated diols by hydrogenation. These furanic diols could be potential replacements for fossil fuel based bisphenol A (BPA) which has an adverse endocrine-disrupting effect on humans. This mild
通过锌/铋介导的巴比尔型反应,从呋喃醛和烯丙基卤化物合成基于生物质的二醇,以获得烯丙基化的二醇。烯丙基化的二醇可以通过氢化容易地转化为烷基化的二醇。这些呋喃二醇可能是基于化石燃料的双酚 A (BPA) 的潜在替代品,双酚 A 对人类具有不利的内分泌干扰作用。这种温和且绿色的方案可提供高产率的对称和非对称二醇。烯丙基双键的化学选择性还原为二醇提供了独特的取代。
JPH03112940A
申请人:——
公开号:JPH03112940A
公开(公告)日:1991-05-14
Ruthenium-catalyzed isomerization of homoallylic alcohols in water
作者:Dong Wang、Dongli Chen、John X. Haberman、Chao-Jun Li
DOI:10.1016/s0040-4020(98)00252-x
日期:1998.5
Through the catalysts of RuCl2(PPh3)(3), the functional groups of homoallylic alcohols are repositioned to give allylic alcohols with controlled regioselectivity. The reaction proceeds most efficiently in an aqueous media. The selectivity in product formation is affected by the reaction temperature and the amount of the catalyst being used. A higher reaction temperature and the use of a smaller amount of the catalyst are preferable for the formation of allylic alcohols. The reaction process was postulated as a tandem olefin migration-allylic rearrangement. Under the same reaction conditions, the functional groups of allylic alcohols undergo allylic rearrangements. (C) 1998 Elsevier Science Ltd. All rights reserved.
Rhodium-Catalyzed Reductive Allylation of Conjugated Aldehydes with Allyl Acetate
作者:Maksym Vasylyev、Howard Alper
DOI:10.1021/jo902706p
日期:2010.4.16
Reductive allylation of aryl and alkenyl aldehydes with allyl acetate catalyzed by the ionic diamine carbonyl rhodium complex, [Rh(TMEDA)(CO)(2)][RhCl(2)(CO)(2)], under a carbon monoxide atmosphere afforded the corresponding homoallylic alcohols in good isolated yields.