Patent ID: 6645932
Filing Date: 2003-11-11
Classification: C07C

Abstract:
An indene of Formula I: wherein R1, R2 each represent a lower alkyl group and R3, R4, R5, R6, R7 and R8 each represent hydrogen or a lower alkyl group or wherein two substituents chosen from R1, R2, R3, R4, R5, R6, R7 and R8 together may represent a di-, tri- or tetra- or pentamethylene moiety or a lower alkyl-substituted di-, tri- or tetra- or pentamethylene moiety and the remaining substituents represent hydrogen or a lower alkyl group, and wherein the total number of carbon atoms is twenty two or less, with the proviso that R1 and R2 together do not represent a tetramethylene moiety if R3, R4, R5, R6, R7 and R8 all represent hydrogen, and with the proviso that R3 does not represent hydrogen if R1, R2, R4, R5, R6, R7 and R8 all represent a methyl group.