HCID 68144627, compound → 13-Ethyl-3-methoxy-6-methylgona-1,3,5(10)-trien-17-one
Reaction equation
[CH2:1]([C@:3]12[CH2:11][CH2:10][C@@H:9]3[C:12]4[CH:13]=[CH:14][C:15]([O:21][CH3:22])=[CH:16][C:17]=4[CH:18]([CH3:20])[CH2:19][C@H:8]3[C@@H:7]1[CH2:6][CH2:5][C:4]12OCC[O:23]1)[CH3:2]>CO.Cl>[CH2:1]([C@:3]12[CH2:11][CH2:10][C@@H:9]3[C:12]4[CH:13]=[CH:14][C:15]([O:21][CH3:22])=[CH:16][C:17]=4[CH:18]([CH3:20])[CH2:19][C@H:8]3[C@@H:7]1[CH2:6][CH2:5][C:4]2=[O:23])[CH3:2]Participants
4
Reactant 1
Product 1
Reagents, catalysts & solvents 2
Procedure
Suspend dl-13-ethyl-3-methoxy-6-methyl-17,17-ethylenedioxygona-1,3,5(10)-triene (9.0 g) in methanol (200 ml) and concentrated hydrochloric acid (5 ml). Heat the mixture on a steam bath for 15 minutes. Remove the solvent under vacuum and partition the residue between ether and aqueous sodium bicarbonate. Remove the organic solvents and dry to obtain a gum. Recrystallize from methanol to obtain dl-13-ethyl-3-methoxy-6-methylgona-1,3,5(10)-trien-17-one (7.29 g), m.p. 115°-123°. Recrystallize from methanol to obtain an analytical sample with m.p. 123°-127°; ultraviolet absorption peak at 280 mμ (ε2,190), infrared maximum (potassium bromide) at 5.75 μ.