RU94033484A - Process for preparing imidazopyridine derivatives - Google Patents
Process for preparing imidazopyridine derivativesInfo
- Publication number
- RU94033484A RU94033484A RU94033484/04A RU94033484A RU94033484A RU 94033484 A RU94033484 A RU 94033484A RU 94033484/04 A RU94033484/04 A RU 94033484/04A RU 94033484 A RU94033484 A RU 94033484A RU 94033484 A RU94033484 A RU 94033484A
- Authority
- RU
- Russia
- Prior art keywords
- general formula
- aryl
- alkyl
- temperature
- hydrohalide
- Prior art date
Links
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Plural Heterocyclic Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
FIELD: medicine. SUBSTANCE: claimed invention describes novel process for preparing imidazopyridines of general formula:wherein R-Rare as defined in the specification. At final stage of the process, amidine of formula:is cyclized with 1,3-dicarbonyl compound of general formula:. Imidazopyridines are valuable intermediate products for preparation of angiotensine-II- antagonists. EFFECT: more efficient preparation process.
Claims (8)
где
R1 обозначает алкильную, циклоалкильную, арильную или аралкильную группу или гетероциклический радикал,
R2 и R4 являются одинаковыми или различными и обозначают водород, гидроксильную, циано-, алкильную, арильную либо аралкильную группу или обозначают алканоил или алкоксикарбонильную группу и
R3 обозначает водород, алкильную, циклоалкильную, арильную или аралкильную группу или атом галогена, отличающийся тем, что нитрил общей формулы
R1CN II,
где R1 имеет указанное значение, преобразуют с помощью тиола общей формулы
R5SH III,
где R5 обозначает алкил, арил или аралкил, в присутствии галогенводорода в тиомидатгидрогалогенид общей формулы
IV,
где R1 и R5 имеют указанное значение и Х обозначает галогенатом, тиоимидатгидрогалогенид преобразуют с помощью аминоацетонитрила в амидин общей формулы
V,
где R1 и Х имеют указанные значения, и в заключение в присутствии основания циклизуют в конечный продукт общей формулы 1 с помощью 1,3-дикарбонилсоединения общей формулы
VI,
где R3 имеет указанное значение и R6 и R7 являются одинаковыми или различными и обозначают алкил, арил, аралкил, алкокси или алкоксикарбонил.1. The method of obtaining derivatives of imidazopyridine of the General formula
Where
R 1 represents an alkyl, cycloalkyl, aryl or aralkyl group or heterocyclic radical,
R 2 and R 4 are the same or different and are hydrogen, hydroxyl, cyano, alkyl, aryl or aralkyl groups or are alkanoyl or alkoxycarbonyl group and
R 3 represents hydrogen, an alkyl, cycloalkyl, aryl or aralkyl group or a halogen atom, characterized in that the nitrile of the general formula
R 1 CN II,
where R 1 has the indicated meaning, is converted using a thiol of the General formula
R 5 SH III,
where R 5 is alkyl, aryl or aralkyl, in the presence of hydrogen halide in a thiomidate hydrohalide of the general formula
IV
where R 1 and R 5 have the indicated meaning and X is a halogenate, thioimidate hydrohalide is converted, using aminoacetonitrile, to an amidine of the general formula
V
where R 1 and X have the indicated meanings, and finally, in the presence of a base, they are cyclized to the final product of the general formula 1 using a 1,3-dicarbonyl compound of the general formula
VI,
where R 3 has the indicated meaning and R 6 and R 7 are the same or different and are alkyl, aryl, aralkyl, alkoxy or alkoxycarbonyl.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH2815/93 | 1993-09-17 | ||
CH281593 | 1993-09-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
RU94033484A true RU94033484A (en) | 1996-08-10 |
Family
ID=48449057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RU94033484/04A RU94033484A (en) | 1993-09-17 | 1994-09-16 | Process for preparing imidazopyridine derivatives |
Country Status (3)
Country | Link |
---|---|
KR (1) | KR950008511A (en) |
RU (1) | RU94033484A (en) |
TW (1) | TW306923B (en) |
-
1994
- 1994-09-15 KR KR1019940023448A patent/KR950008511A/en not_active Application Discontinuation
- 1994-09-16 RU RU94033484/04A patent/RU94033484A/en unknown
- 1994-10-08 TW TW083109360A patent/TW306923B/zh active
Also Published As
Publication number | Publication date |
---|---|
TW306923B (en) | 1997-06-01 |
KR950008511A (en) | 1995-04-17 |
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