| abstract |
PURPOSE: To obtain a compound useful as a synthetic intermediate for cyan coupler in photographic chemical field, etc., in one process and good yield, by reacting a 4-halogeno-1-naphthol with an alkylthiols in the presence of a base. n CONSTITUTION: A compound expressed by formula I (R 1 is a group capable of substituting at an aromatic ring; X is Cl, Br or F; m is 0W6) is reacted with a compound expressed by the formula R 2 SH (R 2 is alkyl) in the presence of a base (e.g., NaOH) in a solvent such as N,N-dimethylformamide at -78W250°C to provide the aimed product expressed by formula II. The compound expressed by formula II and base are each used at molar ratio of 0.01W1000 and 0.1W100. n COPYRIGHT: (C)1989,JPO&Japio |