JPS55133400A - 24,24-difluorocholesterol derivative and its preparation - Google Patents

24,24-difluorocholesterol derivative and its preparation

Info

Publication number
JPS55133400A
JPS55133400A JP3932579A JP3932579A JPS55133400A JP S55133400 A JPS55133400 A JP S55133400A JP 3932579 A JP3932579 A JP 3932579A JP 3932579 A JP3932579 A JP 3932579A JP S55133400 A JPS55133400 A JP S55133400A
Authority
JP
Japan
Prior art keywords
derivative
difluorocholesterol
preparation
formula
group
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
JP3932579A
Other languages
Japanese (ja)
Inventor
Osamu Nishikawa
Kenji Ishimaru
Toru Takeshita
Hideki Tsuruta
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.)
Teijin Ltd
Original Assignee
Teijin Ltd
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 Teijin Ltd filed Critical Teijin Ltd
Priority to JP3932579A priority Critical patent/JPS55133400A/en
Publication of JPS55133400A publication Critical patent/JPS55133400A/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
    • Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups

Landscapes

  • Steroid Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

NEW MATERIAL:The title compound of formula I (R1 is OH-protecting group; R2 is H or protected OH group; R3 and R4 are H or may form a C-C bond).
EXAMPLE: 24,24-Difluoro-3β-hydroxy-cholest-5-ene-acetate.
USE: An intermediate for the synthesis of active vitamin D3.
PROCESS: A 24-oxocholesterol derivative of formula II is reacted with sulfur tetrafluoride or its amino derivative, preferably at 30W100°C for 1W10hr.
COPYRIGHT: (C)1980,JPO&Japio
JP3932579A 1979-04-03 1979-04-03 24,24-difluorocholesterol derivative and its preparation Pending JPS55133400A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3932579A JPS55133400A (en) 1979-04-03 1979-04-03 24,24-difluorocholesterol derivative and its preparation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3932579A JPS55133400A (en) 1979-04-03 1979-04-03 24,24-difluorocholesterol derivative and its preparation

Publications (1)

Publication Number Publication Date
JPS55133400A true JPS55133400A (en) 1980-10-17

Family

ID=12549940

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3932579A Pending JPS55133400A (en) 1979-04-03 1979-04-03 24,24-difluorocholesterol derivative and its preparation

Country Status (1)

Country Link
JP (1) JPS55133400A (en)

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