摘要:
Novel 4,4-bis(4-hydroxyphenyl)cyclohexanecarboxylic acid derivatives. These compounds can be prepared by reacting a cyclohexanone-4-carboxylic acid with a phenol.
摘要:
An improved process of producing 1, 3-dialkyl-2-imidazolidinones directly from N, N'-dialkylethylenediamine and urea with a high yield is provided, which process comprises reacting a N, N'-dialkylethylenediamine of the formula ##STR1## wherein R represents --CH.sub.3, --C.sub.2 H.sub.5, --C.sub.3 H.sub.7 or --C.sub.4 H.sub.9, with urea at 180.degree. C. or higher in the presence of a polar solvent, to obtain a 1, 3-dialkyl-2-imidazolidinone of the formula ##STR2## and preferably comprises carrying out the reaction at two stages, that is, the initial period reaction being carried out at 140.degree. C. or lower to from a 1, 1'-dialkyl-1 1'-dimethylenebisurea and successively the latter reaction being carried out at 180.degree. C. or higher.
摘要翻译:提供了一种直接由N,N'-二烷基乙二胺和尿素以高产率制备1,3-二烷基-2-咪唑啉酮的改进方法,该方法包括使式IMA的N,N'-二烷基乙二胺与R 表示-CH 3,-C 2 H 5,-C 3 H 7或-C 4 H 9,尿素在180℃以上,在极性溶剂的存在下,得到式“IMAGE”的1,3-二烷基-2-咪唑啉酮,优选 包括在两个阶段进行反应,即初始时间反应在140℃或更低温度下进行,从1,1'-二烷基-1,1'-二亚甲基二氢呋喃进行,并且后续反应在 180℃以上。