121626-74-2Relevant articles and documents
Process for the preparation of aryldimethyl(3-aryl-propyl)silanes
-
, (2008/06/13)
The present invention relates to a process for the preparation of compounds of the formula I STR1 where X is CH=CH, N=CH, CH=N or S, R1 and R2 independently of one another are H, halogen, alkyl, alkoxy, alkylthio, haloalkyl, haloalkoxy, haloalkylthio or the bivalent methylenedioxy group, R3 is a radical of the formulae (A), (B) or (C) STR2 where R4 and R5 independently of one another are H, halogen, alkyl, alkoxy or a radical of the formula (D) STR3 in which R6 is H or halogen and Y is CH2, O or S, and m, n, o, p and q are 0, 1, or 2, which comprises reacting a compound of the formula II where R3 is as defined in formula I, with dichloromethylsilane in the presence of a catalyst suitable for hydrosilylation reactions, and reacting the resulting intermediate of the formula III STR4 where R3 is as defined in formula I, in succession and without isolation of the resulting intermediate, with a methylmagnesium halide and an arylmagnesium halide of the general formula IV STR5 where R1, R2, m, n and X are as defined in formula I and Hal is halogen. The invention furthermore relates to the compounds of the formula III.
Process for the preparation of (aryl)-(dimethyl)-(3-(4-fluoro-3-aryloxyphenyl)propyl)silanes
-
, (2008/06/13)
The present invention relates to a process for the preparation of compounds of the formula I STR1 in which R1 denotes H, halogen, (C1 -C4)-alkyl or (C1 -C4)-alkoxy and R2 denotes H, halogen, (C1 -C4)-alkyl, (C1 -C4)-alkyl-thio, (C1 -C4)-alkoxy or the bivalent group 3,4-0-CH2 -O, comprising reacting a compound of the formula II STR2 in which X denotes halogen and R2 has the meaning as in formula I, in the presence of a copper catalyst with an alkali metal phenolate or alkaline earth metal phenolate of the formula III STR3 in which M denotes an alkali metal or an alkaline earth metal and R1 has the meaning as in formula I.
