JPS5545610A - Selective preparation of pyrazines - Google Patents
Selective preparation of pyrazinesInfo
- Publication number
- JPS5545610A JPS5545610A JP11799878A JP11799878A JPS5545610A JP S5545610 A JPS5545610 A JP S5545610A JP 11799878 A JP11799878 A JP 11799878A JP 11799878 A JP11799878 A JP 11799878A JP S5545610 A JPS5545610 A JP S5545610A
- Authority
- JP
- Japan
- Prior art keywords
- pyrazines
- alkyldiamines
- hydroxyalkyl
- formula
- selective preparation
- 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 pyrazines useful as synthetic intermediates for perfumes, agricultural chemicals, medicines, etc. industrially advantageously, by cyclization of N-(β-hydroxyalkyl)alkyldiamines.
CONSTITUTION: N-(β-hydroxyalkyl)alkyldiamines of formula I (R1WR4 are H or 1W10C alkyl) [e.g. N-(β-hydroxyethyl)ethylenediamines] is cyclized, for example, by contact reaction at 200W300°C in the presence of a dehydration and dehydrogenation catalyst, preferably, copper, zinc, etc., to give pyrazines of formula II.
EFFECT: High selectivity, purity, and yield.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11799878A JPS5545610A (en) | 1978-09-27 | 1978-09-27 | Selective preparation of pyrazines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11799878A JPS5545610A (en) | 1978-09-27 | 1978-09-27 | Selective preparation of pyrazines |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5545610A true JPS5545610A (en) | 1980-03-31 |
Family
ID=14725502
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11799878A Pending JPS5545610A (en) | 1978-09-27 | 1978-09-27 | Selective preparation of pyrazines |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5545610A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55122769A (en) * | 1979-03-15 | 1980-09-20 | Mitsuwaka Junyaku Kenkyusho:Kk | Production of pyrazine or lower alkyl-substituted pyrazine |
US4966970A (en) * | 1987-12-31 | 1990-10-30 | Korea Research Institute Of Chemical Technology | Process for manufacturing pyrazines |
US6901230B2 (en) | 1992-12-30 | 2005-05-31 | Ricoh Company, Ltd. | Toner container having lid including lug |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4925947A (en) * | 1972-06-30 | 1974-03-07 | ||
JPS49101391A (en) * | 1973-02-08 | 1974-09-25 | ||
JPS49117480A (en) * | 1973-03-27 | 1974-11-09 |
-
1978
- 1978-09-27 JP JP11799878A patent/JPS5545610A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4925947A (en) * | 1972-06-30 | 1974-03-07 | ||
JPS49101391A (en) * | 1973-02-08 | 1974-09-25 | ||
JPS49117480A (en) * | 1973-03-27 | 1974-11-09 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55122769A (en) * | 1979-03-15 | 1980-09-20 | Mitsuwaka Junyaku Kenkyusho:Kk | Production of pyrazine or lower alkyl-substituted pyrazine |
US4966970A (en) * | 1987-12-31 | 1990-10-30 | Korea Research Institute Of Chemical Technology | Process for manufacturing pyrazines |
US6901230B2 (en) | 1992-12-30 | 2005-05-31 | Ricoh Company, Ltd. | Toner container having lid including lug |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5545610A (en) | Selective preparation of pyrazines | |
JPS5612357A (en) | Production of polymethylenepolyphenylpolycarbamate | |
JPS5585536A (en) | Preparation of 3-methyl-2-cyclopentadecen-1-one | |
JPS5515408A (en) | Novel mitomycin derivative and its preparation | |
JPS5540637A (en) | Preparation of chromene | |
GB986577A (en) | Method of producing dibenzo [a,d] cyclohepta [1,4] dienes | |
JPS54106478A (en) | Preparation of 1, 3-dioxane derivative | |
JPS5398961A (en) | Preparation of indolines | |
JPS52113973A (en) | Synthesis of benzotriazole derivatives | |
JPS5359651A (en) | Preparation of 2-chlorocyclododecanone | |
IE40561L (en) | Substituted quinoxaline 1, 4-dioxides | |
JPS5668668A (en) | Preparation of 2-indolinones | |
JPS5762270A (en) | Preparation of 2-hydroxyquinoxaline derivative | |
JPS52125142A (en) | Preparation of n,n-dialkyltoluamides | |
JPS53137913A (en) | Preparation of cis-epoxysuccinic acid or cis-epoxysuccinate salt | |
JPS5231059A (en) | Preparation of oxybenzoylbenzoic acids | |
JPS55162733A (en) | Preparation of substituted levulinaldehyde | |
JPS5262234A (en) | Process for preparation of n_3'-hydroxyphenyl-2-methylbenzamide | |
JPS57209282A (en) | Lactone derivative and its preparation | |
JPS5461158A (en) | 4-1-acetamido-3-(dichlorophenyl) propyl tropolones | |
JIN et al. | DETERMINATION OF THE STRUCTURES OF THE PRODUCTS BY THE ACTION OF POLYPHOSPHORIC ACID ON METHYL N-(2, 5-DIMETHOXYPHENYL) N-TOSYL-β-ALANINATE | |
JPS5395965A (en) | Preparation of indoles | |
JPS56133220A (en) | Preparation of aldehyde | |
JPS5395985A (en) | Preparation of aminopyrazinecarboxylic acid | |
JPS53112867A (en) | Production of alpha-trihalomethyl-2-thiophenemethanol |