MX9803775A - Procedimiento para la produccion de 2h-1-benzopiranos. - Google Patents
Procedimiento para la produccion de 2h-1-benzopiranos.Info
- Publication number
- MX9803775A MX9803775A MX9803775A MX9803775A MX9803775A MX 9803775 A MX9803775 A MX 9803775A MX 9803775 A MX9803775 A MX 9803775A MX 9803775 A MX9803775 A MX 9803775A MX 9803775 A MX9803775 A MX 9803775A
- Authority
- MX
- Mexico
- Prior art keywords
- group
- alkyl group
- general formula
- hydrogen
- mentioned meaning
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
- C07D311/58—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
- C07D311/58—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4
- C07D311/70—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4 with two hydrocarbon radicals attached in position 2 and elements other than carbon and hydrogen in position 6
- C07D311/72—3,4-Dihydro derivatives having in position 2 at least one methyl radical and in position 6 one oxygen atom, e.g. tocopherols
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pyrane Compounds (AREA)
- Saccharide Compounds (AREA)
Abstract
Un procedimiento para la produccion de 2H-1-benzopiranos con la formula general (I): donde R1 es hidrogeno, un grupo alquilo de C1-C4, R2 es hidrogeno, un grupo alquilo de C1-C6 y R3 es hidrogeno un grupo alquilo de C1-C4, un grupo haloalquilo de C1C4, un grupo alquenilo de C2-C4, un grupo alcoxicarbonilo de C1-C4, un grupo alcoximetilo de C1-C4, un grupo alcanoilo de C1-C4, un grupo alcoxi de C1-C4, un grupo alquilsulfonilo de C1-C4, halogeno, amino, alquilamino, dialquilamino, nitril, nitro o hidroxilo, caracterizado además porque en una primera etapa un aldehído alifático con formula general (II) donde R1 y R2 tienen el significado anteriormente mencionado, se convierte con un alcohol alifático con la formula R4OH o HOR4OH, donde R4 es un grupo alquilo de C1-C4 o un grupo alquildiilo de C2-C4, en presencia de un compuesto deshidratante con la formula HC(OR5)3, donde R5 es un grupo alquilo de C1-C4, y un catalizador de oxido de aluminio/oxido de silicio, en un acetal alifático con formula general (III) donde R1 y R2 tienen el significado anteriormente mencionado y R4 como se establecio con anterioridad es un grupo alquilo de C1-C4 o las dos R4 juntas son un grupo alquildiilo de C2-C4 cíclico, y esto después se condesa en una segunda etapa con un fenol con formula general (IV) donde R3 tiene el significado anteriormente mencionado, en presencia de una base en un solvente orgánico inerte, al producto final con formula general (I).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH198496 | 1996-08-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MX9803775A true MX9803775A (es) | 1998-09-30 |
Family
ID=4223194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MX9803775A MX9803775A (es) | 1996-08-13 | 1998-05-12 | Procedimiento para la produccion de 2h-1-benzopiranos. |
Country Status (21)
| Country | Link |
|---|---|
| EP (1) | EP0882035B1 (es) |
| CN (1) | CN1103768C (es) |
| AP (1) | AP1006A (es) |
| AT (1) | ATE211739T1 (es) |
| AU (1) | AU714918B2 (es) |
| BG (1) | BG63570B1 (es) |
| CO (1) | CO4900048A1 (es) |
| CZ (1) | CZ292668B6 (es) |
| DE (1) | DE69709542T2 (es) |
| DK (1) | DK0882035T3 (es) |
| EA (1) | EA000696B1 (es) |
| ES (1) | ES2170967T3 (es) |
| HK (1) | HK1020438A1 (es) |
| HU (1) | HU223351B1 (es) |
| MX (1) | MX9803775A (es) |
| NZ (1) | NZ330341A (es) |
| PE (1) | PE107298A1 (es) |
| PT (1) | PT882035E (es) |
| SK (1) | SK281933B6 (es) |
| UA (1) | UA49855C2 (es) |
| WO (1) | WO1998006713A1 (es) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005014586A1 (en) * | 2003-08-08 | 2005-02-17 | Arpida Ag | Novel process for the preparation of 2h-chromenes |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW310327B (es) * | 1993-06-18 | 1997-07-11 | Bristol Myers Squibb Co |
-
1997
- 1997-08-13 NZ NZ330341A patent/NZ330341A/en not_active IP Right Cessation
- 1997-08-13 SK SK612-98A patent/SK281933B6/sk not_active IP Right Cessation
- 1997-08-13 ES ES97944779T patent/ES2170967T3/es not_active Expired - Lifetime
- 1997-08-13 EP EP97944779A patent/EP0882035B1/en not_active Expired - Lifetime
- 1997-08-13 AT AT97944779T patent/ATE211739T1/de active
- 1997-08-13 CZ CZ19981469A patent/CZ292668B6/cs not_active IP Right Cessation
- 1997-08-13 UA UA98052383A patent/UA49855C2/uk unknown
- 1997-08-13 WO PCT/EP1997/004569 patent/WO1998006713A1/en active IP Right Grant
- 1997-08-13 DK DK97944779T patent/DK0882035T3/da active
- 1997-08-13 HU HU9902584A patent/HU223351B1/hu active IP Right Grant
- 1997-08-13 AU AU46179/97A patent/AU714918B2/en not_active Expired
- 1997-08-13 CN CN97191398A patent/CN1103768C/zh not_active Expired - Lifetime
- 1997-08-13 PT PT97944779T patent/PT882035E/pt unknown
- 1997-08-13 EA EA199800370A patent/EA000696B1/ru not_active IP Right Cessation
- 1997-08-13 DE DE69709542T patent/DE69709542T2/de not_active Expired - Lifetime
- 1997-08-13 AP APAP/P/1998/001232A patent/AP1006A/en active
- 1997-08-20 PE PE1997000737A patent/PE107298A1/es not_active IP Right Cessation
- 1997-08-22 CO CO97048490A patent/CO4900048A1/es unknown
-
1998
- 1998-05-12 MX MX9803775A patent/MX9803775A/es active IP Right Grant
- 1998-05-12 BG BG102442A patent/BG63570B1/bg unknown
-
1999
- 1999-06-09 HK HK99102507A patent/HK1020438A1/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DK0882035T3 (da) | 2002-04-29 |
| HK1020438A1 (en) | 2000-04-20 |
| HUP9902584A2 (hu) | 2001-05-28 |
| NZ330341A (en) | 2000-02-28 |
| SK61298A3 (en) | 1998-12-02 |
| EP0882035B1 (en) | 2002-01-09 |
| AP1006A (en) | 2001-08-29 |
| CZ146998A3 (cs) | 1998-10-14 |
| BG63570B1 (bg) | 2002-05-31 |
| UA49855C2 (uk) | 2002-10-15 |
| EP0882035A1 (en) | 1998-12-09 |
| CN1205007A (zh) | 1999-01-13 |
| BG102442A (en) | 1999-04-30 |
| AU714918B2 (en) | 2000-01-13 |
| HUP9902584A3 (en) | 2001-06-28 |
| HU223351B1 (hu) | 2004-06-28 |
| EA000696B1 (ru) | 2000-02-28 |
| AP9801232A0 (en) | 1998-06-30 |
| WO1998006713A1 (en) | 1998-02-19 |
| CN1103768C (zh) | 2003-03-26 |
| CO4900048A1 (es) | 2000-03-27 |
| AU4617997A (en) | 1998-03-06 |
| SK281933B6 (sk) | 2001-09-11 |
| CZ292668B6 (cs) | 2003-11-12 |
| PT882035E (pt) | 2002-06-28 |
| EA199800370A1 (ru) | 1998-10-29 |
| ES2170967T3 (es) | 2002-08-16 |
| PE107298A1 (es) | 1999-03-20 |
| DE69709542T2 (de) | 2002-08-22 |
| DE69709542D1 (de) | 2002-02-14 |
| ATE211739T1 (de) | 2002-01-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Grant or registration |