用已过滤的(RAYONET光化学反应器,300 nm)或未过滤的紫外光(高压汞弧灯)照射苯乙烯基-4-吡喃酮1a-1d或2a-2e(6-9×10 -3 M,甲醇溶液)在有氧条件下主要产生二聚体产物。母体5-羟基取代的化合物1a-1d仅产生4-吡喃二聚化的“半笼”二聚体3a-d。5-甲氧基类似物2a-2e的行为类似于典型的二苯乙烯结构,四取代的环丁烷4和5的混合物与少量的菲类化合物6是辐照的唯一可分离产物。产物的结构阐明是基于使用COSY,APT,HETCOR,HMBC和NOESY技术从MS,IR,1 H NMR和13 C NMR光谱获得的光谱数据。
Studies with 1-functionally substituted alkyl azoles: Novel synthesis of functionally substituted azolylbenzimidazoles and functionally substituted azolyl-1,2,4-triazoles
作者:Mohamed Abdel-Megid、Mohamed H. Elnagdi、Abdalla M. Negm
DOI:10.1002/jhet.5570390115
日期:2002.1
ω-Azolylacetophenones 1 and 2 react with dimethylformamide dimethylacetal to yield enaminones 7,8 that were converted into azolylazoles via reaction with hydrazine and with hydroxylamine. Compounds 1,2 also coupled with aromaticdiazoniumsalts to yield arylhydrazones and reacted with nitrous acid to yield corresponding oximes.
Process for synthesizing hydroxymethyl-dihalo-dialkylphenol
申请人:THE DOW CHEMICAL COMPANY
公开号:EP0334195A2
公开(公告)日:1989-09-27
A hydroxymethyl-dihalo-dialkylphenol is synthesized by contacting a halomethyl-dihalo-dialkylphenol with a substantial excess of water in a water-miscible organic solvent at a temperature of less than 55°C. The obtained product can be used to form epoxy resins useful as electrical components.