| abstract |
1-, 2- or 4-tert.butyl-fluorenes (I) are new. USE - (I) are intermediates for antiviral drugs and fluorenylmetallocene catalysts as well as monomers for the mfr. of polyamides and polyureas. In an example, AlMe3 (4.6 ml.) was added to a suspension of 1-carboxyfluorene (III) (2 g.) in toluene and the mixt. was refluxed, cooled and added to dil. HCl. The organic phase was washed, dried and evaporated to give after extn. (pentane), silica gel purificn. and evapn., 1-tert.butyl-fluorene (I) in quantitative yield. |