To easily and safely produce the subject compound useful as a production intermediate for a metallocence complex known as a polymerization catalyst in one step by reacting two specific kinds of compounds in the presence of a Friedel-Crafts catalyst.
The objective substituted indanone of the formula IV or the formula V is produced by reacting a compound of the formula I or the formula II [R1, R2, R3 and R4 are each H, a 1-4C (fluoro)alkyl, a (1-4C alkyl)silyl, phenyl, benzyl or R2 and R3 form a benzene ring together with the bonded C atom] with a compound of the formula III [R5 so a 1-10C alkyl or a (1-4C alkyl- substituted)phenyl; X is Cl, Br or I] in the presence of a Friedel-Crafts catalyst (e.g. AlCl3) in a Friedel-Crafts solvent (e.g. methylene chloride) at -80 to 0°C.
SPAHL ROLAND
MUELLER HANS-JOACHIM
PETER TRUBENBACH
RIEGER BERNHARD
WAGNER JUERGEN MATTHAEUS
DIETRICH ULF
