Process for the preparation of 3-formyl-4-R.sub.2 R.sub.3 -but-3

Details Process for the preparation of 3-formyl-4-R.sub.2 R.sub.3 -but-3 Process for the preparation of 3-formyl-4-R.sub.2 R.sub.3 -but-3

1982-04-16

1983-06-28

Trousof, Natalie

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

Organic compounds

Carboxylic acids and salts thereof

549313, 562505, 562506, 562508, 562577, C07C 6135, C07C 5974

Patent

active

043907245

ABSTRACT:
Novel 3-formyl-4-methyl-pentanoic acid derivatives of the formula ##STR1## wherein Y is an aromatic group, R.sub.2 and R.sub.3 are individually alkyl of 1 to 4 carbon atoms or taken together with the carbon atom to which they are attached form a carbon homocycle of 3 to 6 carbon atoms, the Rs are alkyl of 1 to 6 carbon atoms or together form a polymethylene of 2 to 3 carbon atoms and Z' is selected from the group consisting of --COOH and Z and Z is selected from the group consisting of cyano and --COOR.sub.1 wherein R.sub.1 is alkyl of 1 to 6 carbon atoms and their preparation which are useful for the preparation of 3-formyl-4-R.sub.2 R.sub.3 -but-3-ene-1-oic acid which is an intermediate for the preparation of a compound of the formula ##STR2## wherein R.sub.4 is hydrogen or the remainder of an alcohol of the formula R.sub.1 OH by the process of copending, commonly assigned U.S. patent application Ser. No. 153,338 filed May 27, 1980.

REFERENCES:
patent: 3723469 (1973-03-01), Martel

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