| abstract |
The present invention provides compounds of formula (VI) - wherein R 7 is substituted C 1-8 alkyl, C 2-8 alkenyl, C 2-8 alkynyl, C 3-14 carbocyclic ring system; R 10 is C 1-10 alkyl, benzyl or naphthylmethyl, C 1-4 alkyl substituted with 3,4-methylenedioxybenzyl or phenyl, wherein the phenyl group is substituted with 0-3 R 10a; R 10a is C 1-4 alkyl, C 1-4 alkoxy, halogen or cyano, G together with the oxygen atoms to which G is attached may form -OC (-CH 2 CH 2 CH 2 CH 2 CH 2 -) - O-, -OC (CH 2 CH 3) 2 -O -, -O- -C (CH3) (CH2CH3) -O-, -OC (CH2CH2CH2CH3) 2-O-, -O- -C (CH3) (CH2CH (CH3) CH3) -O-, -O-CH (phenyl) -O-, -OCH2O-, -OC (CH3) 2O- and -OC (OCH3) (CH2CH2CH3) -O-. The invention also relates to a process for the preparation of compounds of formula (VI). SHE |