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A suspension of activated zinc (80 g) in dry tetrahydrofuran (200 ml) was heated to reflux and a few crystals of iodine was added. A solution of 1-indanone (100 g) and methyl 4-bromo-crotonate (200 g) in 500 ml of dry tetrahydrofuran was added dropwise followed by reflux for 1 h. After cooling, ice and aq. ammonium chloride was added followed by extraction with dichloromethane. Removal of the solvent in vacuo gave a viscous oil which was purified on a silica gel column (eluent: dichloromethane/ether=1:1) giving methyl 4-(1 -hydroxyindan-1-yl)-crotonate (78 g).

1. temperaturewas heated
2. temperatureto reflux
3. temperatureby reflux for 1 h
4. temperatureAfter cooling
5. extractionfollowed by extraction with dichloromethane
6. customRemoval of the solvent in vacuo
7. customgave a viscous oil which
8. customwas purified on a silica gel column (eluent: dichloromethane/ether=1:1)