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    • 2. 发明授权
    • Process for preparing 2-hydrazino-1,3-diazacycloalk-2-ene hydrohalides
    • 制备2-肼基-1,3-二氮杂环戊烯-2-烯氢卤化物的方法
    • US4574155A
    • 1986-03-04
    • US587414
    • 1984-03-08
    • Thurairajah Padmanathan
    • Thurairajah Padmanathan
    • C07D233/52C07D239/18C07D239/42C07D239/47C07D243/04C07D243/08C07D245/02C07D239/02
    • C07D245/02C07D233/52C07D239/18C07D243/04
    • This invention provides a process for preparing a 2-hydrazino-1,3-diazacycloalk-2-ene hydrohalide. The process comprises reacting a one molar proportion of either tautomeric isomer of a 2-nitroamino-1,3-diazacycloalk-2-ene represented by the following formulas: ##STR1## wherein R.sup.1 is hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 hydroxyalkyl, C.sub.1 -C.sub.6 alkoxyalkyl, phenyl, substituted phenyl, benzyl, or substituted benzyl, R.sup.2 and R.sup.3 are independently hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkoxyalkyl, hydroxyl, aryl, substituted aryl, aralkyl and substituted aralkyl, and n is an integer from 0 to 3 with about an equimolar proportion of an ammonium halide or hydrazonium halide, and about a 1 to 2 molar proportion of hydrazine hydrate in a composition selected from a C.sub.1 to C.sub.4 aliphatic alcohol, water or a mixture thereof, at a temperature from about ambient to the reflux, and isolating the end product as a monohydrohalide.This invention also provides a process for preparing a 2-hydrazino-1,3-diazacycloalk-2-ene dihydrohalide. The process comprises reacting a compound of the formula: ##STR2## wherein R.sup.1 is hydrogen, C.sub.1 to C.sub.6 alkyl, or C.sub.1 to C.sub.6 hydroxyalkyl, R.sup.2 and R.sup.3 are independently hydrogen or C.sub.1 to C.sub.6 alkyl, n is 0 to 3 and X is a halide ion, with hydrogen halide wherein the halide ion is the same as defined above in a C.sub.1 to C.sub.4 alkyl alcohol at about 0.degree. to 30.degree. C.; and recovering the corresponding 2-hydrazino-1,3-diazacycloalk-2-ene dihydrohalide.
    • 本发明提供了制备2-肼基-1,3-二氮杂环烷-2-烯氢卤化物的方法。 该方法包括使一摩尔比例的由下式表示的2-硝基氨基-1,3-二氮杂环烯-2-烯的互变异构体:其中R 1是氢,C 1 -C 6烷基,C 1 -C 6羟烷基 ,C1-C6烷氧基烷基,苯基,取代的苯基,苄基或取代的苄基,R2和R3独立地是氢,C1-C6烷基,C1-C6烷氧基,C1-C6烷氧基烷基,羟基,芳基,取代的芳基,芳烷基和取代的芳烷基 ,并且n为0至3的整数,其中约等摩尔比例的卤化铵或卤化腙,以及约1至2摩尔比例的选自C1至C4脂族醇,水或混合物的组合物中的水合肼 在约环境温度至回流温度下,分离作为单卤化氢的最终产物。 本发明还提供了制备2-肼基-1,3-二氮杂环戊烯-2-烯二酸盐的方法。 该方法包括使下式化合物:其中R 1为氢,C 1至C 6烷基或C 1至C 6羟基烷基,R 2和R 3独立地为氢或C 1至C 6烷基,n为0至3, X是卤化物离子,其中卤化物,其中卤素离子与上述定义相同,在C1至C4烷基醇中约0至30℃; 并回收相应的2-肼基-1,3-二氮杂环烯-2-烯二氢卤化物。