Process of preparing aromatic aldehydes by reacting selected aromatic compounds with formamidine acetate and an organic acid anhydride
AssigneeE. I. Du Pont de Nemours and Company
InventorWallace C. Petersen
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Abstract
A process of reacting a ring carbon atom of an aromatic compound Ar with a compound of the formula H.sub.2 NCH.dbd.NH.sub.2.sup.+ CH.sub.3 CO.sub.2.sup.-, and an anhydride which has the ##STR1## at from 10.degree. to 200.degree. C. and preferably 25.degree. to 40.degree. C. to form a compound of the formula ##STR2## where m is 1, 2 or 3, and A is H or F. In the case where m is 1 the compound ##STR3## can be hydrolyzed to ArCHO. Additionally, Fischers base can be reacted with formamidine acetate to form ##STR4##
Claims12
A process comprising reacting an aromatic compound Ar, wherein Ar is selected from the group consisting of
- where --R is --CH.sub.3, --C.sub.2 H.sub.5, --CH.sub.2 CH.sub.2 CN, --CH.sub.2 CH.sub.2 OH, --CH.sub.2 CH.sub.2 OCH.sub.3, --CH.sub.2 CH.sub.2 N(CH.sub.3).sub.2 or --CH.sub.2 CH.dbd.CH.sub.2, --R.sup.1 is --R or ##STR47## --R.sup.2 is --H, --CH.sub.3 --C.sub.2 H.sub.5, --OCH.sub.3, --OC.sub.2 H.sub.5, or ##STR48## and R.sup.3 is --H, --CH.sub.3, --OCH.sub.3 or --OC.sub.2 H.sub.5 ;
- ##STR49## with a compound of the formula H.sub.2 NCH .dbd.NH.sup.+CH.sub.3 CO.sub.2.sup.- ;
- and an anhydride of the formula ##STR50## to form a compound of the formula ##STR51## where A is H or F and m is 1, 2, or 3.
Dependencies are inferred from the claim text.