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    • 9. 发明授权
    • Preparation of secondary amines from primary amines
    • 从伯胺制备仲胺
    • US06723880B2
    • 2004-04-20
    • US10173774
    • 2002-06-19
    • Peter NeumannJohann-Peter MelderChristoph BenischArthur HöhnJoachim Pfeffinger
    • Peter NeumannJohann-Peter MelderChristoph BenischArthur HöhnJoachim Pfeffinger
    • C07D41702
    • C07C209/64C07C211/13
    • A process for producing secondary amines of the formula R1R2N—A—NH—A—NR1R2, where R1 and R2 are linear or branched C1-20-alkyl radicals, optionally substituted with from 1 to 5 phenyl groups; or cyclohexyl radicals; or together with the nitrogen atom to which they are bound, form a 3 to 7 membered saturated ring, optionally containing further hetero atoms selected from the group consisting of N, O and S, and optionally substituted with from 1 to 5 C1-2-alkyl groups. The group A is a linear or branched C2-20-alkylene group, optionally containing from 1 to 5 phenylene groups; or a radical of the formula —CH(R3)—[CH2]k—X—[CH(R3)—[CH2]k—X]m—CH(R3)—[CH2]k—, where R3 is H or CH3, X is O, S or NR4, R4 is H or a linear or branched C1-4-alkyl group, k is 1 or 2, and m is an integer from 0 to 4; or a group of the formula where n, o, p, and q are, independently, integers from 1 to 4. In this process, primary amines of the formula R1R2N—A—NH2 are reacted in the presence of hydrogen and a catalyst comprising at least one element or compound of an element of groups VIII and IB of the Periodic Table, preferably group IB, and in particular, Cu. Through this process, a high selectivity of the desired amines can be achieved.
    • 一种制备式R 1 R 2 NA-NH-A-NR 1 R 2的仲胺的方法,其中R 1和R 2是直链或支链C 1-20 - 任选被1至5个苯基取代的烷基; 或环己基; 或与其结合的氮原子一起形成3至7元饱和环,任选地含有选自N,O和S的另外的杂原子,并且任选被1至5个C 1-2 - 烷基。 基团A是任选含有1至5个亚苯基的直链或支链C 2-20 - 亚烷基; 或式-CH(R 3) - [CH 2] k X- [CH(R 3) - [CH 2] k X] m -CH(R 3) - [CH 2] k - 的基团, 其中R 3是H或CH 3,X是O,S或NR 4,R 4是H或直链或支链C 1-4 - 烷基,k是1或2,m是整数 从0到4; 或一组式n,o,p和q独立地为1至4的整数。在该方法中,式R 1 R 2 NA-NH 2的伯胺在存在下反应 氢和包含元素周期表第VIII和IB族元素的至少一种元素或化合物的催化剂,优选IB族,特别是Cu。 通过该方法,可以实现所需胺的高选择性。