JPS55139375A - Production of hydroxyflavan - Google Patents
Production of hydroxyflavanInfo
- Publication number
- JPS55139375A JPS55139375A JP4835579A JP4835579A JPS55139375A JP S55139375 A JPS55139375 A JP S55139375A JP 4835579 A JP4835579 A JP 4835579A JP 4835579 A JP4835579 A JP 4835579A JP S55139375 A JPS55139375 A JP S55139375A
- Authority
- JP
- Japan
- Prior art keywords
- resorcin
- reaction
- aliphatic ketone
- catalyst
- inorganic acid
- 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
Links
Landscapes
- Pyrane Compounds (AREA)
Abstract
PURPOSE: The reaction between an aliphatic ketone and resorcin is effected in the presence of a specific amount of inorganic salt as a catalyst to produce a high-purity hydroxyfuran in high yield in a short time.
CONSTITUTION: The reaction of 1mol of an aliphatic ketone such as acetone or methyl ethyl ketone with three or more moles of resorcin is conducted in the presence of an inorganic acid such as hydrochloric or sulfuric acid as a catalyst in an amount of more than 0.1W0.5, preferably 0.2W0.5, equivalent per mole of the resorcin at 20W80, preferably 40W60°C to give title compound. The reaction is preferably carried out by continuously adding the aliphatic ketone to a mixture of resorcin and the inorganic acid in water. The feed rate is higher than 0.25, preferably 0.25W0.75 equivalent/hr mole of resorcine.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4835579A JPS55139375A (en) | 1979-04-18 | 1979-04-18 | Production of hydroxyflavan |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4835579A JPS55139375A (en) | 1979-04-18 | 1979-04-18 | Production of hydroxyflavan |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55139375A true JPS55139375A (en) | 1980-10-31 |
JPS6157308B2 JPS6157308B2 (en) | 1986-12-06 |
Family
ID=12801045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4835579A Granted JPS55139375A (en) | 1979-04-18 | 1979-04-18 | Production of hydroxyflavan |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55139375A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6127980A (en) * | 1984-07-18 | 1986-02-07 | Mitsui Petrochem Ind Ltd | Preparation of hydroxyflavan compound |
EP0346808A2 (en) * | 1988-06-13 | 1989-12-20 | Sumitomo Chemical Company, Limited | Resist composition |
EP0688770A2 (en) | 1994-06-23 | 1995-12-27 | Sumitomo Chemical Company, Limited | Process for preparing hydroxyflavan compounds |
US5556995A (en) * | 1992-08-07 | 1996-09-17 | Sumitomo Chemical Co., Ltd. | Process for the preparation of polyhydric phenol compounds |
JP2006312731A (en) * | 2005-04-05 | 2006-11-16 | Hodogaya Chem Co Ltd | Manufacturing method of ketone-modified resorcin/formalin resin |
JP2006312733A (en) * | 2005-04-05 | 2006-11-16 | Hodogaya Chem Co Ltd | Resorcin/methyl ethyl ketone/formalin resin |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62187416U (en) * | 1986-05-16 | 1987-11-28 | ||
JPS632256U (en) * | 1986-06-23 | 1988-01-08 | ||
JPH02132354U (en) * | 1989-03-31 | 1990-11-02 |
-
1979
- 1979-04-18 JP JP4835579A patent/JPS55139375A/en active Granted
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6127980A (en) * | 1984-07-18 | 1986-02-07 | Mitsui Petrochem Ind Ltd | Preparation of hydroxyflavan compound |
JPH0244472B2 (en) * | 1984-07-18 | 1990-10-04 | Mitsui Petrochemical Ind | |
EP0346808A2 (en) * | 1988-06-13 | 1989-12-20 | Sumitomo Chemical Company, Limited | Resist composition |
JPH0284650A (en) * | 1988-06-13 | 1990-03-26 | Sumitomo Chem Co Ltd | Positive type resist composition |
EP0346808B1 (en) * | 1988-06-13 | 1996-09-11 | Sumitomo Chemical Company, Limited | Resist composition |
US5556995A (en) * | 1992-08-07 | 1996-09-17 | Sumitomo Chemical Co., Ltd. | Process for the preparation of polyhydric phenol compounds |
EP0688770A2 (en) | 1994-06-23 | 1995-12-27 | Sumitomo Chemical Company, Limited | Process for preparing hydroxyflavan compounds |
US5698717A (en) * | 1994-06-23 | 1997-12-16 | Sumitomo Chemical Company, Limited | Process for preparing hydroxyflavan compounds |
JP2006312731A (en) * | 2005-04-05 | 2006-11-16 | Hodogaya Chem Co Ltd | Manufacturing method of ketone-modified resorcin/formalin resin |
JP2006312733A (en) * | 2005-04-05 | 2006-11-16 | Hodogaya Chem Co Ltd | Resorcin/methyl ethyl ketone/formalin resin |
Also Published As
Publication number | Publication date |
---|---|
JPS6157308B2 (en) | 1986-12-06 |
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