Process for preparing dibenzo[a,d]cycloheptenes

Details Process for preparing dibenzo[a,d]cycloheptenes Process for preparing dibenzo[a,d]cycloheptenes

1973-06-18

1976-04-13

Patten, James A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2603433R, 260349, 260471A, 260471C, 260473F, 260475SC, 2605708R, C07C 63595

Patent

active

039504077

ABSTRACT:
The maleic acid adduct of anthracene is used as a starting material for 11-amino-12-carboalkoxy-9,10-dihydro-9,10-ethanoanthracene, which through reaction with nitrous acid in a protic solvent provides an 11-substituted-12-carboalkoxy-10,11-dihydro-5,10-methano-5H-dibenzo[a,d]cy cloheptene which is then converted into the useful intermediate 12-carboxy-10,11-dihydro-5,10-methano-5H-dibenzo[a,d]cycloheptene.

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