Studies in the field of oxygen-containing heterocycles

2-Chloro- and 2,3-dichlorotetrahydropyrans add to vinyl acetate in the presence of SnCl₄ with the formation of the corresponding gem-acetoxychlorides. The addition of 2-chlorotetrahydropyran to isopropenyl acetate is accompanied by the splitting out of HCl and the formation of the corresponding substituted enol acetate. The reaction products have been hydrolyzed to aldehydes and ketones.For Communication XIII, see [1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, Vol. 6, No. 7, pp. 871–873, July, 1970.