JPS5699467A - Preparation of isochromane - Google Patents
Preparation of isochromaneInfo
- Publication number
- JPS5699467A JPS5699467A JP57080A JP57080A JPS5699467A JP S5699467 A JPS5699467 A JP S5699467A JP 57080 A JP57080 A JP 57080A JP 57080 A JP57080 A JP 57080A JP S5699467 A JPS5699467 A JP S5699467A
- Authority
- JP
- Japan
- Prior art keywords
- chloride
- phosphorus
- oxychloride
- compound
- sulfur
- 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: To obtain isochromane having a musky aroma industrially and advantageously, by adding sulfur or phosphorus chloride or oxychloride to a mixture of an arylalkanol with concentrated sulfuric acid and a compound capable of liberating formaldehyde.
CONSTITUTION: A compound of formula I (R1 and R2 are H, lower alkoxyl or lower alkyl, or form benzo, cyclopentano, cyclohexano, naphtho, etc. when R1 and R2 are at the 2- and 3- positions of the benzene ring; R3 is H or lower alkyl) is mixed with concentrated sulfuric acid and a compound capable of liberating formaldehyde. Sulfur or phosphorus chloride or oxychloride, e.g. phosphorus trichloride, phosphorus oxychloride, sulfuryl chloride, thionyl chloride or sulfur mono- to dichloride is added thereto, and the resultant mixture is reacted preferably at 30W70°C to give the compound of formula II in a quantitative yield in a short time through a simple procedure without using hydrogen chloride.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57080A JPS5699467A (en) | 1980-01-09 | 1980-01-09 | Preparation of isochromane |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57080A JPS5699467A (en) | 1980-01-09 | 1980-01-09 | Preparation of isochromane |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5699467A true JPS5699467A (en) | 1981-08-10 |
JPS6352628B2 JPS6352628B2 (en) | 1988-10-19 |
Family
ID=11477362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57080A Granted JPS5699467A (en) | 1980-01-09 | 1980-01-09 | Preparation of isochromane |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5699467A (en) |
-
1980
- 1980-01-09 JP JP57080A patent/JPS5699467A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6352628B2 (en) | 1988-10-19 |
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