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Dimethylformamide ethylene ketal

Ketalization Adipic acid (catalyst). Butanone ethylene ketal. Dimethylformamide ethylene ketal. Ethylene glycol. Mesityl oxide ethylene ketal. p-Toluenesulfonic acid. [Pg.1389]

Prepared from dimethylformamide diethyl ketal by transacetalization with ethylene glycol. In the presence of a catalytic amount of acetic acid, the reagent reacts selectively with saturated 3-ketosteroids to give the 3-ethyleneketal in the presence of other saturated or unsaturated keto functions. Under the mild conditions cited, A -3-ketosteroids and 12- and 20-ketosteroids do not react. [Pg.875]

Gholestanone ethylene ketal in ethylene chloride treated 1 hr. at room temp, with dimethylformamide and POCI3 in the same solvent 2-formyl-3-j5-... [Pg.629]

See other pages where Dimethylformamide ethylene ketal is mentioned: [Pg.875]    [Pg.326]    [Pg.875]    [Pg.326]    [Pg.701]    [Pg.344]    [Pg.701]    [Pg.701]    [Pg.117]   
See also in sourсe #XX -- [ Pg.111 ]



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