Method of preparing acetal or ketal

Details Method of preparing acetal or ketal Method of preparing acetal or ketal

1987-12-07

1989-06-20

Pal, Asok

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549336, 549337, 549429, 568591, 568594, C07D31700, C07D31722

Patent

active

048410756

ABSTRACT:
A method of preparing an acetal or ketal from a corresponding aldehyde or ketone is disclosed. A hydrous oxide of an element of Group IV of the Periodic Table is used as a catalyst, and the aldehyde or ketone is caused to react with an alcohol. The hydrous oxide can be obtained by partially dehydrating a hydroxide of the corresponding element. The method does not require an acid catalyst and is applicable to a carbonyl compound which is not stable in acids.

REFERENCES:
patent: 3056817 (1962-10-01), Werber et al.
patent: 3725438 (1973-04-01), Barone et al.
patent: 3769303 (1973-10-01), Easter et al.
patent: 4173570 (1979-11-01), Cleare
patent: 4289700 (1979-09-01), Yoshida et al.
patent: 4518785 (1985-05-01), Eckhardt et al.
patent: 4579980 (1986-04-01), Kogoma et al.

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