Benzene → HCID 54335978, compound
Reaction equation
O=[C:2]1[CH2:20][CH2:19][C:5]2[C:6]3[CH:18]=[CH:17][CH:16]=[CH:15][C:7]=3[O:8][C:9]3[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=3[C:4]=2[CH2:3]1.C1C=CC=CC=1.[O-]CC.[Na+].[C:31](#[N:33])[CH3:32]>>[C:31]([CH:32]=[C:2]1[CH2:20][CH2:19][C:5]2[C:6]3[CH:18]=[CH:17][CH:16]=[CH:15][C:7]=3[O:8][C:9]3[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=3[C:4]=2[CH2:3]1)#[N:33]Participants
5
Procedure
1 g of 2-keto-1,2,3,4-tetrahydro-tribenzo(b,d,f)-oxepine is mixed with 1 ml of benzene, 15 ml of acetonitrile and 0.5 g of molecular sieve (4 A). 50 mg of sodium-ethoxide are added and the mixture is heated for 3 hours (90°-100° C.). After cooling the mixture the molecular sieve is filtered off and the filtrate evaporated.