CAS: 7597-18-4; 6-Nitro-1H-Indazole

上下游产品

acetic acid 2-methyl-5-nitroaniline sulfuric acid tert-butyl 6-nitro-1H-indazole-1-carboxylate 1-(6-nitro-1H-indazol-1-yl)ethanone 1-benzyl-6-nitroindazole H-indazole1-benzoyl-6-nitro-1H-indazole 6-nitro-1-(4-nitrobenzoyl)-1H-indazole

2-氨基-4-硝基甲苯置于diazotization Reagent体系中,化学反应生成 6-硝基吲唑
参考文献:新的硝基吲哚基乙腈:通过取代的亲核取代和由阴离子介导的互变异构转换而实现的有效合成途径†
标题:新的硝基吲哚基乙腈:通过取代的亲核取代和由阴离子介导的互变异构转换而实现的有效合成途径†
摘要:通过用4-氯苯氧基乙腈将n-甲基-硝基吲唑类化合物进行亲核取代,可以有效地获得新的n-烷基-硝基吲哚基乙腈.所有化合物均已通过NMR和质谱技术进行了充分表征,其中一些化合物的结构还通过x射线衍射分析数据得到了证实.加入碱性阴离子后,在该系列硝基吲哚基乙腈中观测到互变异构转换,然后进行uv-Vis分光光度法和1 H-NMR滴定.阴离子官能团诱导的互变异构物质的形成得到密度泛函理论计算的支持.
DOI:10.1039/c9Nj02807B

专利信息

专利号:US-6245480-B1
优先权日:1998-12-08
标题 :High contrast photographic element containing a novel nucleator
发明人：BOGIE JUDITH A; COLDRICK PHILIP J; GODDARD JOHN D; LEYSHON LLEWELLYN J
权利人:EASTMAN KODAK CO
摘要:The invention relates to an ultrahigh contrast photographic material comprising a support bearing a silver halide emulsion layer, containing a hydrazide nucleating agent in the emulsion layer or a hydrophilic colloid layer, characterised in that the nucleating agent of formula (I) comprises (a) two nicotinamide moieties, which may be the same or different, which are linked by a linking group, and (b) a hydrazide moiety linked to only one of the nicotinamide moieties. The nucleator of formula (I) may be in combination with a nucleator of formula (II) which comprises a dimeric molecule comprising two monomers linked by a linking group, each monomer of which (a) may be the same or different and (b) comprises a hydrazide moiety and a nicotinamide moiety.The photographic material provides unexpectedly good nucleation in the absence of, or with reduced amounts of, booster and in a developer whose pH is variable, and further with lower chemical spread and pepper fog. When the synthesis provides both a compound of formula (I) and (II), the products can be used directly without a separation step, providing a cost advantage.

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