Hydrochalcogenation of phenylthioacetylenes. Synthesis of mixed (Z)-trisubstituted 1,2-bis(organylchalcogeno)-1-alkenes
摘要:
The treatment of 1-phenylthioacetylenes with phenylselenolate and butyl or phenyltellurolate anions generated by the reaction of the corresponding dichalcogenide with NaBH4 in aqueous ethanol results in the formation of mixed 1,2-bis(organylchalcogeno)-1-alkenes of Z configuration. The phenylthio group acts as a directing and activating group for the nucleophilic addition of the chalcogenate anions (C) 2001 Elsevier Science Ltd. All rights reserved.
Hydrochalcogenation of phenylthioacetylenes. Synthesis of mixed (Z)-trisubstituted 1,2-bis(organylchalcogeno)-1-alkenes
摘要:
The treatment of 1-phenylthioacetylenes with phenylselenolate and butyl or phenyltellurolate anions generated by the reaction of the corresponding dichalcogenide with NaBH4 in aqueous ethanol results in the formation of mixed 1,2-bis(organylchalcogeno)-1-alkenes of Z configuration. The phenylthio group acts as a directing and activating group for the nucleophilic addition of the chalcogenate anions (C) 2001 Elsevier Science Ltd. All rights reserved.
Csp3-tellurium copper cross-coupling: synthesis of alkynyl tellurides a novel class of antidepressive-like compounds
作者:Afamefuna Elvis Okoronkwo、Benhur Godoi、Ricardo Frederico Schumacher、José Sebastião Santos Neto、Cristiane Luchese、Marina Prigol、Cristina Wayne Nogueira、Gilson Zeni
DOI:10.1016/j.tetlet.2008.12.024
日期:2009.2
We present here the results on the synthesis of functionalized alkynyl tellurides using the reaction of vinyl, alkynyl, and aryl tellurides with several alkynyl iodides catalyzed by copper iodide. The reaction proceeded cleanly under mild reaction conditions, at room temperature, in the absence of base and ligand giving alkynyl tellurides in acceptable yields. The obtained compounds 3a-c and 3m-o were screened for antidepressive-like activity using the tail Suspension test (TST) in mice. Compounds 3a-c and 3m-o administered at 10 mg/kg by oral route produced a significant antidepressant-like effect on the TST in mice. (C) 2008 Elsevier Ltd. All rights reserved.
One-pot synthesis of mixed ( )-1,2-bis(organylchalcogene)-1-alkenes precursors of the novel β-organylthio vinyllithium intermediates
作者:Miguel J. Dabdoub、Vânia B. Dabdoub、Marco A. Pereira、Adriano C.M. Baroni、Francisco A. Marques、Paulo R. de Oliveira、Palimécio G. Guerrero
DOI:10.1016/j.tetlet.2010.07.112
日期:2010.9
One-pot hydrochalcogenation of 1-phenylthioacetylenes using organylselenolate and organyltellurolate anions generated by the insertions of selenium and tellurium in n-organyl lithium produced (Z)-1,2-bis(organylchalcogene)-1-alkenes. The chemical reactivity of these mixed 1,2-bis(organylchalcogene)-1-alkenes was studied by Te/Li and Se/Li stereoretentive exchanges carried out with n-butyl lithium, furnishing the new intermediate species (Z)-beta-organylthio vinyllithium anions, which were trapped with aldehydes, to give the (Z)-3-hydroxy vinyl thioethers with total control of the regio- and stereochemistry. (c) 2010 Elsevier Ltd. All rights reserved.
Hydrochalcogenation of phenylthioacetylenes. Synthesis of mixed (Z)-trisubstituted 1,2-bis(organylchalcogeno)-1-alkenes
作者:Miguel J Dabdoub、Vânia B Dabdoub、Marco A Pereira
DOI:10.1016/s0040-4039(00)02291-7
日期:2001.2
The treatment of 1-phenylthioacetylenes with phenylselenolate and butyl or phenyltellurolate anions generated by the reaction of the corresponding dichalcogenide with NaBH4 in aqueous ethanol results in the formation of mixed 1,2-bis(organylchalcogeno)-1-alkenes of Z configuration. The phenylthio group acts as a directing and activating group for the nucleophilic addition of the chalcogenate anions (C) 2001 Elsevier Science Ltd. All rights reserved.