The Suzuki–Miyaura cross-coupling of bromo- and chloroarenes with arylboronic acids in supercritical carbon dioxide
摘要:
Haloarenes ArHal (Hal = Br, Cl) react with arylboronic acids in supercritical carbon dioxide in the presence of a system comprising Pd(OCOCF(3))(2)/Buchwald phosphine ligand/potassium carbonate (phosphate)/18-crown-6 to yield the corresponding cross-coupling products in high yields; all chlorine atoms in di- and tetrachloroarenes are replaced by aryl groups under the proposed conditions.
Di-substituted meta-terphenyl compounds and resulting polymers
申请人:Institut Francais du Petrole
公开号:US04064176A1
公开(公告)日:1977-12-20
New tetracarbonyl compounds of the formula ##STR1## where R is a hydrogen atom, an alkyl radical or an aryl radical. The invention also contemplates the thermostable polymers obtained by reacting an aromatic tetra-amine with at least one of the above tetracarbonyl compounds.
New di-substituted meta-terphenyl compounds and resulting polymers
申请人:Institut Francais du Petrole
公开号:US04045414A1
公开(公告)日:1977-08-30
New tetracarbonyl compounds of the formulae: ##STR1## where R is a hydrogen atom, an alkyl radical or an aryl radical. The invention also contemplates the thermostable polymers obtained by reacting an aromatic tetra-amine with at least one of the above tetracarbonyl compounds.