| 摘要 |
<p>1377179 Phenolic derivatives POLAROID CORP 3 Dec 1971 [17 Dec 1970 (2) 8 March 1971] 56245/71 Heading C2C [Also in Divisions C3 and G2] Novel compounds of formula wherein X represents the atoms necessary to complete a benzene or a naphthalene nucleus that may be further substituted, Y is a hydroxy or a substituent which upon hydrolysis provides hydroxy, each radical R is a hydrogen or alkyl radical containing less than 5 carbon atoms, CR 2 M is in a position ortho or para to Y and M is a moiety that is released from the compound upon alkaline hydrolysis to form a silver halide solvent, a developing agent, a toning agent, an antifoggant or a development restrainer or is a moiety such that the compound before alkaline hydrolysis but not after is a gelatine hardener, are prepared conventionally. Typical compounds include and corresponding ortho isomers and compounds in which the phenolic groups are esterified with acetic acid.</p> |
