Improved synthesis of 1,4-diaza-2-cycloalkanone and substituted derivatives thereof
申请人:The B.F. GOODRICH Company
公开号:EP0004460A1
公开(公告)日:1979-10-03
The present invention provides a process for the synthesis of a 1,4-diaza-2-cycloalkanone characterized in that a diamine of the formula
wherein R1 and R2 are independently selected from hydrogen, halogen, alkyl of 1 to 12 carbon atoms, hydroxyalkyl, haloalkyl, cyanoalkyl, aminoalkyl, iminoalkyl, ether, nitrosyl, hydroxyalkyl ethers, cyano alkyl ethers, alkenyl, alkaline and carboalkoxy; R3 to R6 being independently selected from alkyl of 1 to 12 carbon atoms, cycloalkyl, hydroxycycloalkyl, aminoalkyl, iminoalkyl, alkenyl, aralkyl and alkylene, provided further that any two of the above hydrocarbon substituents pendant from the same carbon atoms can collectively form a cyclic or alicyclic hydrocarbon and n is 0 to 3 is contacted. in the presence of a phase transfer catalyst, with a stoichiometric excess of an a-trihaloalkyl- alcohol of the formula
wherein R7 and R8 are selected from the same group of substituents as R3 to R6 X is halogen; and m is a number from 0 to 5.
本发明提供了一种合成 1,4-二氮杂-2-环烷酮的工艺,其特征在于式中的二胺
其中 R1 和 R2 独立选自氢、卤素、1 至 12 个碳原子的烷基、羟基烷基、卤代烷基、氰基烷基、氨基烷基、亚氨基烷基、醚、亚硝基、羟基烷基醚、氰基烷基醚、烯基、烷基和羧基烷氧基;R3 至 R6 分别独立地选自 1 至 12 个碳原子的烷基、环烷基、羟基环烷基、氨基烷基、亚氨基烷基、烯基、芳基和亚烷基,条件是上述烃类取代基中任意两个由相同碳原子悬垂的取代基可共同形成环烃或脂环烃,且 n 为 0 至 3。在相转移催化剂的存在下,与按化学计量过量的式如下的 a-三卤代烷基醇接触
其中 R7 和 R8 选自与 R3 至 R6 相同的取代基组 X 为卤素;以及 m 为 0 至 5 的数字。