JPS55139383A - Production of spirochroman derivative - Google Patents
Production of spirochroman derivativeInfo
- Publication number
- JPS55139383A JPS55139383A JP4767979A JP4767979A JPS55139383A JP S55139383 A JPS55139383 A JP S55139383A JP 4767979 A JP4767979 A JP 4767979A JP 4767979 A JP4767979 A JP 4767979A JP S55139383 A JPS55139383 A JP S55139383A
- Authority
- JP
- Japan
- Prior art keywords
- resorcin
- inorganic acid
- derivative
- reaction
- methyl
- 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
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Abstract
PURPOSE: The reaction between an aliphatic ketone and resorcin at a specific molar ratio is effected in the presence of a specific amount of inorganic acid to produce high-purity title compound useful as a monomer for epoxy resin, asistant for photographic films and others in high yield in a short time.
CONSTITUTION: The reaction between 1mol of aliphatic ketone and 1W3mol of resorcin is carried out in the presence of more than 0.5, preferably 1.0W4.0 equivalents, per mol of resorcin, of inorganic acid to give a spirothroman derivative of the formula (R1 is methyl, ethyl; R2 is H, methyl). The optimum reaction temperature is 40W80°C. The inorganic acid is preferably hydrochloric or sulfuric acid. The present invention prevents the formation of flavane derivatives and polymers and gives the objective compound with high selectivity.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4767979A JPS55139383A (en) | 1979-04-17 | 1979-04-17 | Production of spirochroman derivative |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4767979A JPS55139383A (en) | 1979-04-17 | 1979-04-17 | Production of spirochroman derivative |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55139383A true JPS55139383A (en) | 1980-10-31 |
JPS6356230B2 JPS6356230B2 (en) | 1988-11-07 |
Family
ID=12781957
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4767979A Granted JPS55139383A (en) | 1979-04-17 | 1979-04-17 | Production of spirochroman derivative |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55139383A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0242013A2 (en) | 1986-01-20 | 1987-10-21 | Konica Corporation | Silver halide color photographic light-sensitive material |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4960631A (en) * | 1988-12-30 | 1990-10-02 | Ppg Industries, Inc. | Moisture seal for aircraft windows |
-
1979
- 1979-04-17 JP JP4767979A patent/JPS55139383A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0242013A2 (en) | 1986-01-20 | 1987-10-21 | Konica Corporation | Silver halide color photographic light-sensitive material |
Also Published As
Publication number | Publication date |
---|---|
JPS6356230B2 (en) | 1988-11-07 |
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