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JPS57171954A - Method for condensing n-phenylcarbamic acid ester - Google Patents

Method for condensing n-phenylcarbamic acid ester

Info

Publication number
JPS57171954A
JPS57171954A JP56056770A JP5677081A JPS57171954A JP S57171954 A JPS57171954 A JP S57171954A JP 56056770 A JP56056770 A JP 56056770A JP 5677081 A JP5677081 A JP 5677081A JP S57171954 A JPS57171954 A JP S57171954A
Authority
JP
Japan
Prior art keywords
acid ester
methylene
group
phenylcarbamic acid
phenylcarbamic
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.)
Granted
Application number
JP56056770A
Other languages
Japanese (ja)
Other versions
JPS6244544B2 (en
Inventor
Shinsuke Fukuoka
Masazumi Chono
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.)
Asahi Kasei Corp
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
Asahi Kasei Kogyo KK
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 Asahi Chemical Industry Co Ltd, Asahi Kasei Kogyo KK filed Critical Asahi Chemical Industry Co Ltd
Priority to JP56056770A priority Critical patent/JPS57171954A/en
Publication of JPS57171954A publication Critical patent/JPS57171954A/en
Publication of JPS6244544B2 publication Critical patent/JPS6244544B2/ja
Granted 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

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

PURPOSE: To prepare the bis-condensate of the titled ester, useful as a precursor of crude MDI, in high selectivity, by reacting an N-phenylcarbamic acid ester with a methylene-introducing agent using a carboxyl-containing fluorinated sulfonic acid resin as a catalyst.
CONSTITUTION: Methylene-bis-(4-phenylcarbamic acid ester) can be prepared by reacting an N-phenylcarbamic acid ester of formulaI(R is alkyl, etc.; R' is H or substituent group such as alkyl, etc.; said substituent group bonds to o- or m-position to the urethane group; r is 0W4; when r is ≥2, R' is may be same or different) with a methylene-introducing agent (e.g. HCHO) in the presence of a carboxyl group-containing fluorinated sulfonic acid resin. The resin contains the group of formula II, etc.
EFFECT: The process is non-corrosive to the reaction apparatus, the reaction can be easily made continuous, and there is no discharge of waste acid solution.
COPYRIGHT: (C)1982,JPO&Japio
JP56056770A 1981-04-15 1981-04-15 Method for condensing n-phenylcarbamic acid ester Granted JPS57171954A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56056770A JPS57171954A (en) 1981-04-15 1981-04-15 Method for condensing n-phenylcarbamic acid ester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56056770A JPS57171954A (en) 1981-04-15 1981-04-15 Method for condensing n-phenylcarbamic acid ester

Publications (2)

Publication Number Publication Date
JPS57171954A true JPS57171954A (en) 1982-10-22
JPS6244544B2 JPS6244544B2 (en) 1987-09-21

Family

ID=13036709

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56056770A Granted JPS57171954A (en) 1981-04-15 1981-04-15 Method for condensing n-phenylcarbamic acid ester

Country Status (1)

Country Link
JP (1) JPS57171954A (en)

Also Published As

Publication number Publication date
JPS6244544B2 (en) 1987-09-21

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