发明授权
US5264582A Method of forming a photographic coupler capable of forming a wash-out
dye
失效
形成能够形成洗出染料的照相成色剂的方法
- 专利标题: Method of forming a photographic coupler capable of forming a wash-out dye
- 专利标题(中): 形成能够形成洗出染料的照相成色剂的方法
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申请号: US903782申请日: 1992-06-24
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公开(公告)号: US5264582A公开(公告)日: 1993-11-23
- 发明人: William J. Begley , Robert C. Stewart
- 申请人: William J. Begley , Robert C. Stewart
- 申请人地址: NY Rochester
- 专利权人: Eastman Kodak Company
- 当前专利权人: Eastman Kodak Company
- 当前专利权人地址: NY Rochester
- 主分类号: C07D257/04
- IPC分类号: C07D257/04 ; C07D271/10 ; C07D271/113 ; C07D401/12 ; C07D403/12 ; G03C7/305 ; G03C7/32 ; C07D257/02 ; G03C7/26
摘要:
A method of preparing a washout photographic coupler comprising a coupler moiety (COUP) containing a substituted or unsubstituted ballasted releasing group (A) selected from aryloxy, thioaryloxy, heterocyclicoxy, and thioheterocyclicoxy releasing groups having attached thereto a phenoxy timing group containing a photographically useful group (PUG), the releasing group capable of elimination electron transfer to release the timing group, the method comprising:(a) providing a coupler moiety (COUP) having the releasing group (A) in a coupling off position, the releasing group (A) having on at least one of the 2- or 4-position a substituted or unsubstituted halomethyl;(b) reacting a substituted or unsubstituted hydroxyaryl aldehyde or hydroxyaryl ketone with the halomethyl group of step (a) in the presence of an alkylpyridine and a dipolar aprotic solvent to form a first product; and(c) reducing the first product and halogenating the reduced first product before reacting with a photographically useful group to form the washout photographic coupler.
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