GB1508924A - Process for the manufacture of methylglyoxal dimethyl acetal - Google Patents

Process for the manufacture of methylglyoxal dimethyl acetal

Info

Publication number
GB1508924A
GB1508924A GB3361476A GB3361476A GB1508924A GB 1508924 A GB1508924 A GB 1508924A GB 3361476 A GB3361476 A GB 3361476A GB 3361476 A GB3361476 A GB 3361476A GB 1508924 A GB1508924 A GB 1508924A
Authority
GB
United Kingdom
Prior art keywords
dimethyl acetal
manufacture
methylglyoxal dimethyl
nitrosating agent
methylglyoxal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3361476A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
F Hoffmann La Roche AG
Original Assignee
F Hoffmann La Roche AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by F Hoffmann La Roche AG filed Critical F Hoffmann La Roche AG
Publication of GB1508924A publication Critical patent/GB1508924A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/67—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
    • C07C45/68—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
    • C07C45/70—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction with functional groups containing oxygen only in singly bound form
    • C07C45/71—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction with functional groups containing oxygen only in singly bound form being hydroxy groups

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1508924 Methylglyoxal dimethyl acetal F HOFFMANN - LA ROCHE & CO AG 12 Aug 1976 [13 Aug 1975] 33614/76 Heading C2C Methylglyoxal dimethyl acetal is prepared by reacting acetone with a nitrosating agent, isolating the resultant isonitrosoacetone and acetalizing this in the presence of a nitrosating agent and methyl alcohol. The nitrosating agent in the first step may be an alkali metal nitrate (Na) and an acid (HCl); in the second step methyl nitrite and an acid, e.g. HCl, may be used.
GB3361476A 1975-08-13 1976-08-12 Process for the manufacture of methylglyoxal dimethyl acetal Expired GB1508924A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1053275A CH598174A5 (en) 1975-08-13 1975-08-13

Publications (1)

Publication Number Publication Date
GB1508924A true GB1508924A (en) 1978-04-26

Family

ID=4364222

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3361476A Expired GB1508924A (en) 1975-08-13 1976-08-12 Process for the manufacture of methylglyoxal dimethyl acetal

Country Status (7)

Country Link
JP (1) JPS5223013A (en)
BE (1) BE845111A (en)
CH (1) CH598174A5 (en)
DE (1) DE2635958A1 (en)
FR (1) FR2320928A1 (en)
GB (1) GB1508924A (en)
NL (1) NL7608576A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2604159B2 (en) * 1986-06-25 1997-04-30 邦夫 岡部 Three-dimensional volume change rotary mechanism

Also Published As

Publication number Publication date
BE845111A (en) 1977-02-14
JPS5223013A (en) 1977-02-21
CH598174A5 (en) 1978-04-28
FR2320928A1 (en) 1977-03-11
NL7608576A (en) 1977-02-15
DE2635958A1 (en) 1977-03-03

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee