REACTION OF 1-ETHOXY-2,3-DI- tert -BUTYLCYCLOPROPENIUM FLUOROBORATE WITH SODIUM TETRACHIOROCYCLOPENTADIENIDE: FORMATION OF A DIHYDROPENTALENONE DERIVATIVE
Reaction.of 1-ethoxy-2.3-di-tert-butylcyclopropenium fluoroborate with sodium tetrachlorocyclopentadienide in methylene chloride gives 1,2-dihydro-2,3-di-tert-butyl-4,5,6-trichloropentalen-1-one along with 1,2,3,4-tetrachloro-5,6-di-tert-butylcalicene.