Title:
【発明の名称】リビチルキシリジンの改良製法
Document Type and Number:
Japanese Patent JPH07108887
Kind Code:
B2
Abstract:
N-(D)-ribitylxylidine (I) is prepared by reacting (D)-ribose (II) with 3,4-dimethylaniline (III) or 3,4-dimethyl-1-nitrobenzene (IV) in aqueous or aqueous/organic solution or in solution in a water-soluble organic solvent under an elevated hydrogen pressure and in the presence of a hydrogenation catalyst and of a boric acid compound, (a) using the boric acid compound in a catalytic amount of from about 6 to 35 mmol, preferably from 6 to 20 mmol, per mol of ribose, (b) carrying out the reaction under a hydrogen pressure of from 1 to 20, preferably from 2 to 9, bar and (c) carrying out the hydrogenation at from 40 DEG to 80 DEG C. over Raney nickel as hydrogenation catalyst.
Inventors:
Hans Georg Ernst
Hartmut Reininger
Joachim Poust
Hartmut Reininger
Joachim Poust
Application Number:
JP10650387A
Publication Date:
November 22, 1995
Filing Date:
May 01, 1987
Export Citation:
Assignee:
Bassf Axchen Gezel Shaft
International Classes:
C07B61/00; B01J25/00; B01J25/02; C07C67/00; C07C213/00; C07C213/02; C07C215/10; C07C215/16; C07C215/68; C07H5/04; (IPC1-7): C07C215/10; C07C213/02
Domestic Patent References:
| JP5770850A |
Attorney, Agent or Firm:
Toshio Yano (2 outside)
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