JPS55102581A - Preparation of 4-piperidone spiroketal compound - Google Patents
Preparation of 4-piperidone spiroketal compoundInfo
- Publication number
- JPS55102581A JPS55102581A JP1081779A JP1081779A JPS55102581A JP S55102581 A JPS55102581 A JP S55102581A JP 1081779 A JP1081779 A JP 1081779A JP 1081779 A JP1081779 A JP 1081779A JP S55102581 A JPS55102581 A JP S55102581A
- Authority
- JP
- Japan
- Prior art keywords
- compound
- piperidone
- alkyl
- preparation
- formula
- 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
Links
Landscapes
- Nitrogen Condensed Heterocyclic Rings (AREA)
Abstract
PURPOSE: To prepare a 4-piperidone spiroketal compound useful as a photo-stabilizer or its intermediate, easily, in high yield, by reacting a 4-piperidone compound or its acid addition salt with a 1,3-dioxane compound.
CONSTITUTION: The title compound of formula III is prepared, in high yield, in a short reaction time, by reacting (A) a 4-piperidone compound of formula I (R1 is H or alkyl) or its acid addition salt with (B) a 1,3-dioxane compound of formula II (R2 is alkyl; R3,4 are H, alkyl or aryl, or R3 and R4 may together form an alkylene), in a solvent such as alcohol, in the presence of an acidic catalyst such as phosphoric acid, at 20W300°C.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1081779A JPS55102581A (en) | 1979-01-31 | 1979-01-31 | Preparation of 4-piperidone spiroketal compound |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1081779A JPS55102581A (en) | 1979-01-31 | 1979-01-31 | Preparation of 4-piperidone spiroketal compound |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55102581A true JPS55102581A (en) | 1980-08-05 |
Family
ID=11760897
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1081779A Pending JPS55102581A (en) | 1979-01-31 | 1979-01-31 | Preparation of 4-piperidone spiroketal compound |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55102581A (en) |
-
1979
- 1979-01-31 JP JP1081779A patent/JPS55102581A/en active Pending
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