Hydrochloric Acid → HCID 14570276, Verbindung

Reaktionsgleichung

[CH3:1][S:2](Cl)(=[O:4])=[O:3].[OH:6][CH2:7][CH2:8][C:9]1([CH2:23][CH2:24][OH:25])[C:22]2[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=2[O:16][C:15]2[C:10]1=[CH:11][CH:12]=[CH:13][CH:14]=2.Cl>N1C=CC=CC=1>[CH3:1][S:2]([O:25][CH2:24][CH2:23][C:9]1([CH2:8][CH2:7][O:6][S:2]([CH3:1])(=[O:4])=[O:3])[C:10]2[CH:11]=[CH:12][CH:13]=[CH:14][C:15]=2[O:16][C:17]2[C:22]1=[CH:21][CH:20]=[CH:19][CH:18]=2)(=[O:4])=[O:3]

Komponenten

Versuchsvorschrift

A mixture of 9,9-bis(2'-vinyloxyethyl)xanthene (57 g.) (prepared as in Example 2), water (400 ml.) and concentrated hydrochloric acid (15 ml.) is heated on the steambath with vigorous stirring for 5 hours. The cooled mixture is extracted three times with ether and the combined extracts are dried over MgSO4 and evaporated to dryness. The solid residue is recrystallised from chloroform-light petroleum (b.p. 60°-80° C.) to give 9,9-bis(2'-hydroxyethyl)xanthene, m.p. 144°-145° C. Methanesulphonyl chloride (588 mg.) is added dropwise over 5 minutes at 5° C. to a solution of 9,9-bis(2'-hydroxyethyl)xanthene (0.54 g.) in dry pyridine (5 ml.) with stirring. The mixture is allowed to stand at room temperature for 20 hours and is then poured into a mixture of 3 N hydrochloric acid (20 ml.) and ice (10 g.), and the resulting mixture is extracted with ethyl acetate. The ethyl acetate extract is washed with 3 N hydrochloric acid and water, dried over MgSO4, and evaporated to dryness. The solid residue is recrystallised from acetone-light petroleum (b.p. 60°-80° C.) to give 9,9-bis(2'-methanesulphonyloxyethyl)-xanthene, m.p. 121°-122° C.