| abstract |
The present invention relates to a process for preparing 1-indanones of formula I: n n n and isomers thereof, wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 independently represent H or a C 1 -C 20 hydrocarbon group or R 1 and R 2 or R 2 and R 3 or R 3 and R 4 and/or R 5 and R 6 together with the carbon atoms to which they are attached form a saturated or unsaturated 5- or 6-membered ring, said hydrocarbon group and/or said ring optionally containing one or more hetero atoms, said ring optionally being substituted with a C 1 -C 4 hydrocarbon group, said process comprising reacting a compound of formula II: n n n wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 have the same meaning as defined above, with a chlorinating agent, followed by reaction with a Friedel-Crafts catalyst. The invention further relates to the preparation of the corresponding indenes. |