Novel rhenium(i) catalysts for the isomerization of propargylic alcohols into α,β-unsaturated carbonyl compounds: an unprecedented recyclable catalytic system in ionic liquids
作者:Joaquín García-Álvarez、Josefina Díez、José Gimeno、Christine M. Seifried
DOI:10.1039/c1cc10768b
日期:——
Carbonyl rhenium(I) complexes are efficient catalysts for the regioselective isomerization of terminal propargylic alcohols into α,β-unsaturated aldehydes or ketones which can be used as an unprecedented recyclable catalytic system (up to 10 consecutive runs) in the ionic liquid [BMIM][PF6].
Deep eutectic solvent-catalyzed Meyer–Schuster rearrangement of propargylic alcohols under mild and bench reaction conditions
作者:Nicolás Ríos-Lombardía、Luciana Cicco、Kota Yamamoto、José A. Hernández-Fernández、Francisco Morís、Vito Capriati、Joaquín García-Álvarez、Javier González-Sabín
DOI:10.1039/d0cc06584f
日期:——
The Meyer–Schuster rearrangement of propargylic alcohols into α,β-unsaturated carbonyl compounds has been revisited by setting up an atom-economic process catalyzed by a deep eutectic solvent FeCl3·6H2O/glycerol. Isomerizations take place smoothly, at room temperature, under air and with short reaction times. The unique solubilizing properties of the eutectic mixture enabled the use of a substrate
通过建立由低共熔溶剂FeCl 3 ·6H 2 O /甘油催化的原子经济过程,重新探讨了炔丙醇向α,β-不饱和羰基化合物的Meyer-Schuster重排。异构化可在室温,空气,短反应时间内平稳进行。低共熔混合物独特的增溶性能使其能够使用浓度高达1.0 M的底物,并且将介质循环使用多达十次,而不会损失任何催化活性。
Isomerization of Propargylic Alcohols into α,β-Unsaturated Carbonyl Compounds Catalyzed by the Sixteen-Electron Allyl-Ruthenium(II) Complex [Ru(η3-2-C3H4Me)(CO)(dppf)][SbF6]
作者:Victorio Cadierno、Sergio E. García-Garrido、José Gimeno
DOI:10.1002/adsc.200505294
日期:2006.1
(η3-allyl)-ruthenium(II) complex [Ru(η3-2-C3H4Me)(CO)(dppf)][SbF6] is an efficient catalyst for the regioselective isomerization of terminal propargylic alcohols HCCCR1R2(OH) into α,β-unsaturatedaldehydes R1R2CCHCHO or ketones R3R4CC(R1)COMe (if R2=CHR3R4) under mild conditions. This complex has been also used as catalyst for the preparation of conjugated 1,3-enynes via dehydration of propargylic alcohols
16-E -(η 3 -烯丙基) -钌(II)配合物的[Ru(η 3 -2-C 3 H ^ 4 ME)(CO)(DPPF)] [的SbF 6 ]是用于区域选择性异构化的有效催化剂在温和条件下将末端炔丙醇HCCCR 1 R 2(OH)转变为α,β-不饱和醛R 1 R 2 CCHCHO或酮R 3 R 4 CC(R 1)COMe(如果R 2 = CHR 3 R 4)。这种复杂的也已用作催化剂用于制备缀合的1,3-烯炔的经由 炔丙醇的脱水。
Synthesis and Reactivity of New Rhenium(I) Complexes Containing Iminophosphorane-Phosphine Ligands: Application to the Catalytic Isomerization of Propargylic Alcohols in Ionic Liquids
作者:Joaquín García-Álvarez、Josefina Díez、José Gimeno、Christine M. Seifried、Cristian Vidal
DOI:10.1021/ic4003687
日期:2013.5.6
activity of complex 4d in the regioselective isomerization of terminal propargylic alcohols HC≡CCR1R2(OH) into α,β-unsaturated aldehydes R1R2C═CHCHO or ketones R3R4C═CR1COMe (if R2 = CHR3R4) under neutral conditions in ionic liquids has being studied. Isolation and X-ray characterization of the key intermediate rhenium(I) oxocyclocarbene complex [Re═C(CH2)3O}(κ2-P,S-Ph2PCH2P═NP(═S)(OPh)2}Ph2)(CO)3][SbF6]
The behavior of 3,4-dimethyl-1-pentyn-3-ol (II) and 3-isopropyl-4-methyl-1-pentyn-3-ol (III) toward formicacid was investigated. The carbinols, as in the previous report, were chosen as model ones in which the tertiary carbon atom is adjacent to the carbon atom carrying the hydroxyl group. Both carbinols gave a significant quantity of the respective aldehydes. These aldehydes were easily isolated