GB717904A - Improvements in or relating to methods of producing ª‰-ionylidene acetaldehyde - Google Patents

Improvements in or relating to methods of producing ª‰-ionylidene acetaldehyde

Info

Publication number
GB717904A
GB717904A GB17556/50A GB1755650A GB717904A GB 717904 A GB717904 A GB 717904A GB 17556/50 A GB17556/50 A GB 17556/50A GB 1755650 A GB1755650 A GB 1755650A GB 717904 A GB717904 A GB 717904A
Authority
GB
United Kingdom
Prior art keywords
ionylidene
relating
producing
methods
acetaldehyde
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
GB17556/50A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB717904A publication Critical patent/GB717904A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C403/00—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone
    • C07C403/14—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone having side-chains substituted by doubly-bound oxygen atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2601/00—Systems containing only non-condensed rings
    • C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
    • C07C2601/16—Systems containing only non-condensed rings with a six-membered ring the ring being unsaturated

Landscapes

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

Abstract

b -Ionylidene acetaldehyde, and C18 ketone and Vitamin A acid therefrom are obtained by reducing b -ionylidene acetonitrile with LiAlH4 at low temperatures, followed by hydrolysis, and, if desired, conversion by known methods into the above-mentioned derivatives. The aldehyde is further separated as bisulphite. In examples, the nitrile is reduced as described in various solvents, followed by hydrolysis with aqueous acid, conversion into bisulphite compound and separation from the latter with aqueous alkali. Specification 684,757 is referred to. Particulars of the U.V. absorption spectra of the b -ionylidene acetaldehyde and a number of its derivatives are given, including that of the semicarbazone and phenyl semicarbazone.
GB17556/50A 1949-07-16 1950-07-13 Improvements in or relating to methods of producing ª‰-ionylidene acetaldehyde Expired GB717904A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL289984X 1949-07-16

Publications (1)

Publication Number Publication Date
GB717904A true GB717904A (en) 1954-11-03

Family

ID=19782708

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17556/50A Expired GB717904A (en) 1949-07-16 1950-07-13 Improvements in or relating to methods of producing ª‰-ionylidene acetaldehyde

Country Status (3)

Country Link
CH (1) CH289984A (en)
FR (1) FR1022925A (en)
GB (1) GB717904A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL99527C (en) * 1955-09-14
NL228279A (en) * 1957-06-01

Also Published As

Publication number Publication date
FR1022925A (en) 1953-03-11
CH289984A (en) 1953-04-15

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