m-Chloroperbenzoic acid → 3-Cyanodibenzo[b,f]thiepin 5-oxide

Reaktionsgleichung

[C:1]([C:3]1[CH:4]=[CH:5][C:6]2[CH:12]=[CH:11][C:10]3[CH:13]=[CH:14][CH:15]=[CH:16][C:9]=3[S:8][C:7]=2[CH:17]=1)#[N:2].ClC1C=CC=C(C(OO)=[O:26])C=1.[OH-].[Ca+2].[OH-]>C(Cl)Cl>[C:1]([C:3]1[CH:4]=[CH:5][C:6]2[CH:12]=[CH:11][C:10]3[CH:13]=[CH:14][CH:15]=[CH:16][C:9]=3[S:8](=[O:26])[C:7]=2[CH:17]=1)#[N:2]

Komponenten

Versuchsvorschrift

5 G. 3-cyanodibenzo[b,f]thiepin (0.021 mole) are dissolved in 300 cc. methylene chloride and 3.45 g. m-chloroperbenzoic acid (0.020 mole) are added in portions. The solution is stirred for two hours at room temperature, then excess calcium hydroxide is added. The mixture is stirred for a few minutes and filtered through celite, the filtrate is evaporated down and the residue chromatographed on silica gel, eluting with a 50:50 mixture of chloroform and benzene. A small amount of starting material is recovered, and the yield of sulfoxide is 4.92 g. (92%), light yellow solid, m.p. 220° C.-222° C.