Synthesis of N,N′,N″-trisubstituted thiourea derivatives and their antagonist effect on the vanilloid receptor
摘要:
Twenty-seven N,N',N"-trisubstituted thiourea derivatives were prepared. Among them, 1-[3-(4'-hydroxy-3'-methoxy- phenyl)-propyl]-1.3-diphenethyl-thiourea (81, IC50=0.32 muM), showed 2-fold higher antagonistic actively than that of capsazepine (3, IC50 = 0.65 muM) against the,anilloid receptor in a Ca-45(2+)-influx assay. (C) 2003 Elsevier Science Ltd. All rights reserved.
Biphasic hydroformylation of substituted allylbenzenes with water-soluble rhodium or ruthenium complexes
作者:Luis G. Melean、Mariandry Rodriguez、Marynell Romero、Maria L. Alvarado、Merlin Rosales、Pablo J. Baricelli
DOI:10.1016/j.apcata.2010.12.037
日期:2011.2
The water-solublecomplexes [Rh(CO)(Pz)(L)]2 and [HRu(CO)(CH3CN)(L)3][BF4] [L = TPPMS (m-sulfonatophenyl-diphenylphosphine) and TPPTS (tris-m-sulfonato-phenylphosphine)] were used for the first time as catalyst precursors for the hydroformylation of eugenol, estragole, safrole and trans-anethole under moderate conditions in biphasic media. Under mild reaction conditions the substrates showed the following
One-pot hydroformylation/O-acylation of propenylbenzenes for the synthesis of polyfunctionalized fragrances
作者:Fábio G. Delolo、Gabriel M. Vieira、Jesus A.A. Villarreal、Eduardo N. dos Santos、Elena V. Gusevskaya
DOI:10.1016/j.cattod.2020.04.053
日期:2021.12
A process involving the hydroformylation/O-acylation of propenylbenzenes with a phenolic group is described for eugenol, isoeugenol, chavicol, propenyl guaethol, 2-allylphenol, and 2-allyl-6-methylphenol. The reactions occur in parallel, under the same reaction conditions in anisole, a solvent with an impressive sustainability rank comparable to those of ethanol and water. The products contain formyl
Hydroformylation of natural olefins with the [Rh(COD)(μ-OMe)]2/TPPTS complex in BMI-BF4/toluene biphasic medium: Observations on the interfacial role of CTAB in reactive systems
作者:Pablo J. Baricelli、Mariandry Rodríguez、Luis G. Melean、Margarita Borusiak、Isis Crespo、Juan C. Pereira、Merlín Rosales
DOI:10.1016/j.mcat.2020.111189
日期:2020.12
The complex [Rh(COD)(μ-OMe)]2 in presence of TPPTS (TPPTS = triphenylphosphinetrisulfonate) was evaluated as catalyst precursor for the in situ hydroformylation of natural olefins (eugenol, estragole and safrole) in biphasic media BMIm-BF4/toluene. Under moderate reaction conditions, the substrates showed the following reactivity order: eugenol > estragole > safrole. The rhodium system showed a high
Verfahren zur Hydroformylierung von substituierten Allylbenzolen
申请人:Celanese Chemicals Europe GmbH
公开号:EP1719752A1
公开(公告)日:2006-11-08
Die vorliegende Erfindung betrifft ein Verfahren zur Hydroformylierung von substituierten Allylbenzolen, insbesondere von Eugenol, Estragol, Eugenolmethylether und Safrol in Gegenwart einer wässrigen Katalysatorlösung, enthaltend wasserlösliche Rhodiumverbindungen, die sulfonierte Arylphosphine in komplexer Bindung enthalten.
Production of diacetates from propenylphenols: A one-pot two-step approach involving hydroformylation/hydrogenation/O-acylation
作者:Adelson de O. Dias、Fábio G. Delolo、Jesus A. Avendaño-Villarreal、Eduardo N. dos Santos、Elena V. Gusevskaya
DOI:10.1016/j.apcata.2023.119369
日期:2023.9
A one-pot two-step approach for the synthesis of diacetate estersfrom propenylphenols was developed. This protocol involves the functionalization of the propenylphenol in two remote sites, performing multiple consecutive and parallel reactions: hydroformylation of the C-C double bond, hydrogenation of the formed aldehyde, and the O-acylation of both phenolic and hydroxy groups of the resulting alcohol
开发了一种由丙烯基酚合成二乙酸酯的一锅两步法。该方案涉及丙烯基苯酚在两个远程位点的官能化,执行多个连续且平行的反应:CC双键的加氢甲酰化、形成的醛的氢化以及所得醇的酚基和羟基的O-酰化。对于这样一个具有挑战性的转化,必须开发特定的催化系统,包括用于串联加氢甲酰化/氢化的Rh络合物和磷(III)配体,以及4-二甲基氨基吡啶(有机催化剂)以促进Ac 2 O的酰化步骤。 Ac 2的存在在氢化步骤导致不希望的副反应之前,开发了一锅两步方案以提高选择性。最终,该方法能够从丙烯基酚中以良好到优异的收率(82-96%)获得二乙酸酯,二乙酸酯作为香料和香料成分具有潜在的价值。