JPS55129277A - Preparation of r-( )-pantolactone - Google Patents

Preparation of r-( )-pantolactone

Info

Publication number
JPS55129277A
JPS55129277A JP3513879A JP3513879A JPS55129277A JP S55129277 A JPS55129277 A JP S55129277A JP 3513879 A JP3513879 A JP 3513879A JP 3513879 A JP3513879 A JP 3513879A JP S55129277 A JPS55129277 A JP S55129277A
Authority
JP
Japan
Prior art keywords
compound
catalyst
rhcl
clo
butyrolactone
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.)
Pending
Application number
JP3513879A
Other languages
Japanese (ja)
Inventor
Kazuo Achinami
Iwao Oshima
Naoyasu Ishizuka
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.)
Fuji Yakuhin Kogyo KK
Sagami Chemical Research Institute
Original Assignee
Fuji Yakuhin Kogyo KK
Sagami Chemical Research Institute
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 Fuji Yakuhin Kogyo KK, Sagami Chemical Research Institute filed Critical Fuji Yakuhin Kogyo KK
Priority to JP3513879A priority Critical patent/JPS55129277A/en
Publication of JPS55129277A publication Critical patent/JPS55129277A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Abstract

PURPOSE: To obtain the title compound useful as a raw material for a medicine, D-(+)-pantolactone, industrially advantageously, by hydrogenating an α-keto- β,β-dimethyl-γ-butyrolactone in the presence of a specific high polymer rhodium complex as a catalyst.
CONSTITUTION: An α-keto-β,β-dimethyl-γ-butyrolactone is hydrogenated in the presence of a compound of formula I: [R1 and R3 are H or CH3; R2 is alkyl, hydroxyalkyl groups, etc.; R4 is formulas II, III, and IV: [Z is RhCl, Rh+ClO4 -, RhCl.Y, Rh+ClO4 - .Y (Y is an olefin compound coordinated with the Rh)]; m and n are numercial values to show the proportion of the units in the parentheses contained in the molecule] to give the objective compound. The method facilitates the separation and recovery of the objective compound from the catalyst in high purity and yield, and provides complete recovery of the catalyst directly reusable.
COPYRIGHT: (C)1980,JPO&Japio
JP3513879A 1979-03-27 1979-03-27 Preparation of r-( )-pantolactone Pending JPS55129277A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3513879A JPS55129277A (en) 1979-03-27 1979-03-27 Preparation of r-( )-pantolactone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3513879A JPS55129277A (en) 1979-03-27 1979-03-27 Preparation of r-( )-pantolactone

Publications (1)

Publication Number Publication Date
JPS55129277A true JPS55129277A (en) 1980-10-06

Family

ID=12433546

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3513879A Pending JPS55129277A (en) 1979-03-27 1979-03-27 Preparation of r-( )-pantolactone

Country Status (1)

Country Link
JP (1) JPS55129277A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5364885A (en) * 1992-11-13 1994-11-15 Ahluwalia Gurpreet S Reduction of hair growth

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5364885A (en) * 1992-11-13 1994-11-15 Ahluwalia Gurpreet S Reduction of hair growth

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