JPS5620583A - Synthesis of 3-alkyl-2-methyldihydro-4h-1,3-thiazinium salt - Google Patents
Synthesis of 3-alkyl-2-methyldihydro-4h-1,3-thiazinium saltInfo
- Publication number
- JPS5620583A JPS5620583A JP9507279A JP9507279A JPS5620583A JP S5620583 A JPS5620583 A JP S5620583A JP 9507279 A JP9507279 A JP 9507279A JP 9507279 A JP9507279 A JP 9507279A JP S5620583 A JPS5620583 A JP S5620583A
- Authority
- JP
- Japan
- Prior art keywords
- compound
- formula
- thiazinium
- alkyl
- acidic conditions
- 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
Abstract
PURPOSE: To obtain the titled compound in high yield, simply by hydrolyzing a compound readily prepared from a compound, e.g. 3-methyl-2-methylthiodihydro- 4H-1,3-thiazinium iodide, and a compound having an active methylene under acidic conditions.
CONSTITUTION: A compound of formula I (R1 is alkyl; R2 and R3 are acyl, alkoxycarbonyl, alkoxyoxalyl, carbamoyl, carboxy, oxalo or cyano group, e.g. 2-(α- acetyl -α- ethoxycarbonylmethylidene )-3-methylperhydro -1, 3- thiazine, is hydrolyzed under acidic conditions to give the objective compound, e.g. 2,3-dimethyldihydro-4H-1,3-thiazinium chloride. The compound of formula I can be obtained by reacting a compound of formula III (X1 - is anion) with a compound of formula IV having an active methylene.
USE: An intermediate for a coloring matter used as a spectrum photosensitizer of a photosensitive material with a silver halide.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9507279A JPS5620583A (en) | 1979-07-27 | 1979-07-27 | Synthesis of 3-alkyl-2-methyldihydro-4h-1,3-thiazinium salt |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9507279A JPS5620583A (en) | 1979-07-27 | 1979-07-27 | Synthesis of 3-alkyl-2-methyldihydro-4h-1,3-thiazinium salt |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5620583A true JPS5620583A (en) | 1981-02-26 |
Family
ID=14127776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9507279A Pending JPS5620583A (en) | 1979-07-27 | 1979-07-27 | Synthesis of 3-alkyl-2-methyldihydro-4h-1,3-thiazinium salt |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5620583A (en) |
-
1979
- 1979-07-27 JP JP9507279A patent/JPS5620583A/en active Pending
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