PRODUCTION OF CYCLIC ANHYDRIDE OF HYDANTOIN OR AMINO ACID

    公开(公告)号:JP2000327666A

    公开(公告)日:2000-11-28

    申请号:JP2000124501

    申请日:2000-04-25

    Applicant: BASF AG

    Abstract: PROBLEM TO BE SOLVED: To easily produce a cyclic anhydride of hydantoin or amino acid useful as an intermediate for the production of an essential amino acid such as methionine by reacting an aldehyde with urea, etc., and CO in the presence of a transition metal catalyst. SOLUTION: The objective compound of formula II is produced by reacting an aldehyde of formula R-CHO [R is a (substituted)alkyl or a (substituted)aryl] with CO and a compound of formula I [R2 is NH2 or the like; R3 is H, a (substituted)alkyl, a (substituted)aryl or the like] in the presence of a transition metal catalyst (e.g. Fe or Pd). The catalyst is preferably a mixture of a palladium compound (e.g. PdBr2), an ionic compound (e.g. phosphonium bromide) and an acid (e.g. sulfuric acid). The reaction is carried out preferably by using a solvent such as N-methylpyrrolidone under a pressure of 0.1-200 bar. This synthetic process does not form a by-produced salt to be disposed.

    10.
    发明专利
    未知

    公开(公告)号:ES2210642T3

    公开(公告)日:2004-07-01

    申请号:ES98119484

    申请日:1998-10-15

    Applicant: BASF AG

    Abstract: A multistage process for preparing propene, in which the first stage is the reaction of 1-butene, 2-butene and isobutene to give propene, 2-pentene and 2-methyl-2-butene in the presence of a metathesis catalyst comprising at least one compound of a metal of transition group VIb, VIIb or VIII of the Periodic Table of the Elements; the second stage is separation of the propene and 2-pentene/2-methyl-2-butene formed; the third stage is reaction of the 2-pentene and 2-methyl-2-butene with ethehe to give propene, 1-butene and isobutene in the presence of a metathesis catalyst comprising at least one compound of a metal of transition group VIb, VIIb or VIII of the Periodic Table of the Elements; the fourth stage is separation of the propene and 1-butene/isobutene formed and returning the 1-butene and isobutene formed to the first stage.

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