新型无色DAR成色剂的合成

释放显影促进剂的成色剂(DAR)对彩色感光材料向高感、微粒方面发展起了重要作用。本文合成了三支无色DAR成色剂,选用N,N’-双-(2-氯-5-正十二烷氧基羰基)苯基丙二酰胺为母体,以2,5-二巯基-1,3,4-噻二唑为吸附基团,分别采用2-甲酰基苯肼、2-乙酰基苯肼和2-三氟乙酰基苯肼为增强基团,研究了它们的合成方法,得到了无色DAR成色剂YKA、YKB、YKC。通过红外光谱、质谱、核磁共振1H谱等测试方法对成色剂的中间体及目标产物进行了表征和确认。

Synthesis of Novel Colorless DAR Couplers

The improvement of the color photographic materials having higher photosensitivity and smaller granularily,owes much to the developent accelerator releasing couplers.With 〔5-mercapto-（1,3,4） thiadiazol-2-yl-thio〕-acetic acid adopted as the adsorption group and formic acid 2-（4-amino-pheny1）-hydrazide,acetic acid 2-（4-amino-pheny1）-hydrazide and trifluoro-acetic acid 2-（4-amino-pheny1）-hydrazide as the strengthen groups respectively,three new colorless DAR（YKA,YKB,YKC） couplers were synthesized from N,N＇-bis-（2-chloro-5-n-dodecyloxy-carbony1） phenylmalonamide.The intermediates and the target compounds were characterized and confirmed by means of IR,MS,1HNMS.