AN EFFICIENT AND SIMPLE PROCEDURE FOR PREPARATION OF ESTERS AND ANHYDRIDES FROM ACID CHLORIDES IN THE PRESENCE OF 1,4-DIAZABICYCLO[2.2.2]OCTANE (DABCO) UNDER SOLVENT-FREE CONDITIONS
作者:A. R. Hajipour、Gh. Mazloumi
DOI:10.1081/scc-120001504
日期:2002.1.1
one-pot and rapid method for the synthesis of aliphatic and aromatic ester and anhydride from acid chloride and alcohol or potassium salt of carboxylic acid under solvent-free conditions is reported. The reaction has been carried out in excellent yield and short reaction time in the presence of 1,4-diazabicyclo[2.2.2]octane (DABCO) under solvent-free conditions.
Synthesis of Aryl Ethers from Benzoates through Carboxylate-Directed CH-Activating Alkoxylation with Concomitant Protodecarboxylation
作者:Sukalyan Bhadra、Wojciech I. Dzik、Lukas J. Gooßen
DOI:10.1002/anie.201208755
日期:2013.3.4
copper/silver bimetallic catalyst system, aromatic carboxylate salts undergo ortho CH alkoxylation with concomitant loss of the carboxylate directing group in a protodecarboxylation step (see scheme, FG=functional group). This process provides a convenient synthetic access to the important class of aromatic ethersfrom widely available carboxylic acids.
Decarboxylative Cross-Coupling of Aryl Tosylates with Aromatic Carboxylate Salts
作者:Lukas J. Gooßen、Nuria Rodríguez、Paul P. Lange、Christophe Linder
DOI:10.1002/anie.200905953
日期:2010.2.1
A bimetallic copper/palladium catalyst system is disclosed that enables the use of tosylates as carbon electrophiles in decarboxylative coupling reactions. A variety of aromaticcarboxylatesalts, regardless of their substitution pattern, have been coupled with these inexpensive and readily available electrophiles to give the corresponding biaryl compounds in good yields (see scheme).