Adyl Oussaid

LA REACTION DE DIELS-ALDER CATALYSEE PAR LES SELS DE BISMUTH (III)

We have studied the Diels–Alder reaction from the dienes (1–3) and dienophiles (4–6), catalyzed by bismuth triflate and bismuth chloride. We compared these two catalysts with SnCl4, ZnI2, AlCl3 and Cu(BF4)2 respectively. With bismuth derivatives we noted no polymerisation, a better yield and a good selectivity in cycloadditions.

Mécanismes de Formation d'α-Aminophosphonates

When di-n-decylphosphonate 1a or di-benzylphosphite 1b are reacted with furan imine 2a or thiophenic imine 2b , the reaction leads to an f -aminophosphonate: 3a , 3b , or 3c following an ion- or radical-based reaction.

Ene Réaction et Réaction de Substitution sur Des Hétérocycles Catalysées par les Sels de Bi(III)

Carbonylated electrophiles react with furan, thiophene, or pyrrole derivatives in the presence of catalytic amounts of bismuth triflate or chloride, leading to either electrophilic substitution or ene reaction products.

IN-SITU SYNTHESES OF ALKYLLITHIUM COMPOUNDS UNDER ULTRASONIC IRRADIATION

Abstract The syntheses of organometallics such as alkyllithium compounds are performed. Furan and thiophene derivatives were prepared. Parameters which influence the yield have been optimized. The more important were the physical states of lithium and its sodium content and the nature of the substrate.

Les sels de bismuth(III), catalyseurs dans la réaction de clivage des éthers

Abstract Bismuth(III) salts as catalysts in the ether cleavage reaction. Bi (OTf)3 and BiCl3 react in catalytic quantity to cleaved the tertiobutyl–oxygen bound of the ethers 1, 3, 5.