- Process for the production of benzene derivatives
-
The present invention relates to a process for the production of benzene derivatives represented by formula (I), which are useful as intermediates for agricultural chemicals, fine chemical products or pharmaceuticals such as anti inflammatory analgesics. The process includes reacting a compound of chemical formula (II) with a hydroformylating agent and a halogenating agent.
- -
-
-
- Formation of Heptafulvene in Reactions of phenylcarbene in the Gas Phases
-
Flash vacuum pyrolysis of phenyl>diazomethanes produced 1-(methoxycarbonyl)benzocyclobutene, as a result of intramolecular C-H insertion in the ortho isomer of phenyl>carbene generated by carbene-carbene rearrangement, and 8-(methoxycarbonyl)heptafulvene, presumably formed by intramolecular H migration in the seven-membered ring intermediates involved in the rearrangement.
- Tomioka, Hideo,Taketsuji, Kohji
-
p. 4196 - 4197
(2007/10/02)
-
- SYNGAS REACTIONS II. THE HOMOGENEOUS CATALYZED CARBONYLATION AND CYCLIZATION OF ALLYLIC SUBSTRATES
-
Carbon monoxide insertion and/or addition to allylic precursors may lead to the formation of both linear and cyclic carbonylation products.In examining these competing reaction paths, rhodium, platinum, palladium and nickel-based homogeneous catalysts have been developed which are particularly useful for the selective synthesis of γ-butyrolactam, N-alkyl-2-pyrrolidones, vinylacetate and phenylacetate esters and diesters from a variety of allylic and benzylic substrates.The extension of this catalysis to the carbonylation of certain vinylic and propargyl congeners hasalso been considered.
- Knifton, John F.
-
p. 223 - 236
(2007/10/02)
-