| abstract |
NEW MATERIAL:6,6'-(Ethylenedioxy)-di-2-naphthoic acid of the formula (R is OR' or halogen; R' is H, lower alkyl, cycloalkyl or aryl) and a derivative thereof. n EXAMPLE: Ethyl 6,6'-(ethylenedioxy)-di-2-naphthoate. n USE: A raw material useful for preparing condensation polymers such as aromatic polyesters, aromatic polyamides, etc. n PREPARATION: An alkali metal salt of a 2-hydroxy-6-naphthoic acid ester is reacted with a 1,2-dihalogenated ethane in the presence of a solvent, e.g. N,N- dimethylformamide, at 50W200°C, preferably 60W180°C under ordinary W higher pressure. The resultant 6,6'-(ethylenedioxy)-di-2-naphthoic acid ester is hydrolyzed to afford the aimed 6,6'-(ethylenedioxy)-di-2-naphthoic acid. n COPYRIGHT: (C)1985,JPO&Japio |