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    • 84. 发明授权
    • Process for producing pyridinaldehydes
    • 吡啶醛生产工艺
    • US4322536A
    • 1982-03-30
    • US164459
    • 1980-06-30
    • Rolf BaderDieter Reinehr
    • Rolf BaderDieter Reinehr
    • C07D213/38C07D213/48C07D213/53C09B26/02C09B55/00
    • C07D213/53C07D213/38C07D213/48C09B26/02
    • A new improved process for producing pyridinaldehydes and hydrazone derivatives thereof, for example, pyridinaldehyde-phenylhydrazones, is described. This comprises reacting an aminomethylpyridine with an aldehyde or a ketone to give a compound of the formula ##STR1## isomerizing the compound (III), in the presence of suitable catalysts, to a compound of the formula ##STR2## and converting the compound (V), in the presence of an acid and optionally in the presence of a hydrazine, into a pyridinaldehyde or a pyridinaldehyde-hydrazone. It is possible to produce by the process according to the invention pyridinaldehydes and pyridinaldehyde-hydrazones in a simple manner, under mild ecologically favorable conditions and in good to very good yields.
    • 描述了一种新的改进的吡啶醛和腙衍生物的制备方法,例如吡啶酮醛 - 苯腙。 这包括使氨基甲基吡啶与醛或酮反应,得到在合适的催化剂存在下将化合物(III)异构化的式(III)化合物转化为式(V)化合物, 和在酸的存在下和任选地在肼的存在下将化合物(V)转化成吡啶甲醛或吡哆醛 - 腙。 根据本发明的方法,可以在温和的生态有利条件下以良好至非常好的产率,以简单的方式生产吡哆醛和吡哆醛 - 腙。
    • 85. 发明授权
    • Transparent polyamide from branched chain C.sub.11 diamine
    • 来自支链C11二胺的透明聚酰胺
    • US4297480A
    • 1981-10-27
    • US83142
    • 1979-10-09
    • Josef PfeiferDieter Reinehr
    • Josef PfeiferDieter Reinehr
    • C08G69/00C08G69/26
    • C08G69/26
    • There are described transparent polyamides, and processes for producing them, which polyamides consist of recurring structural elements of the formula I ##STR1## or of recurring structural elements of the formula II ##STR2## [carbonyl groups in the structural elements (II) bound in the 1,3- and/or 1,4-position to the benzene nucleus, R.sub.1 =C.sub.1-12 -alkyl, R.sub.2 =H, C.sub.1-12 -alkyl, R.sub.3 =C.sub.1-12 -alkyl, C.sub.4-12 -cycloalkyl, C.sub.7-8 -aralkyl, unsubstituted or substituted aryl, R.sub.4 =H, C.sub.1-12 -alkyl, C.sub.4-12 -cycloalkyl, C.sub.7-8 -aralkyl, or unsubstituted or substituted aryl, or R.sub.3 /R.sub.4 together=C.sub.3-11 -alkylene, R.sub.5 /R.sub.6 independently of one another=hydrogen or methyl, and R.sub.7 /R.sub.8 together=C.sub.3-11 -alkylene]. The polyamides according to the invention are suitable for producing transparent moulded articles of the widest variety, and are distinguished in particular by low water absorption, high stability to hydrolysis, and/or good dimensional stability under the action of moisture or humidity.
    • 描述了透明聚酰胺及其制备方法,该聚酰胺由式I的重复结构元素组成或式II的重复结构元素(II) 结构元素(II)中的羰基与1,3-环中的1,3-和/或1,4-位结合,R1 = C1-12烷基,R2 = H,C1-12 - 烷基,R3 = C 1-12烷基,C 4-12 - 环烷基,C 7-8 - 芳烷基,未取代或取代的芳基,R 4 = H,C 1-12 - 烷基,C 4-12 - 环烷基,C7-8-芳烷基或未取代或取代的芳基 ,或R 3 / R 4一起= C 3-11 - 亚烷基,R 5 / R 6彼此独立地为氢或甲基,并且R 7 / R 8一起为C 3-10亚烷基。 根据本发明的聚酰胺适用于生产最广泛品种的透明模塑制品,特别是在水分或湿度作用下,具有低吸水率,高水解稳定性和/或良好的尺寸稳定性。