DE193543C - - Google Patents
Info
- Publication number
- DE193543C DE193543C DENDAT193543D DE193543DA DE193543C DE 193543 C DE193543 C DE 193543C DE NDAT193543 D DENDAT193543 D DE NDAT193543D DE 193543D A DE193543D A DE 193543DA DE 193543 C DE193543 C DE 193543C
- Authority
- DE
- Germany
- Prior art keywords
- dichloropiperonal
- anhydration
- protocatechualdehyde
- patented
- displaying
- 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.)
- Active
Links
- IBGBGRVKPALMCQ-UHFFFAOYSA-N Protocatechuic aldehyde Chemical compound OC1=CC=C(C=O)C=C1O IBGBGRVKPALMCQ-UHFFFAOYSA-N 0.000 claims 2
- 239000002253 acid Substances 0.000 claims 1
- 150000007513 acids Chemical class 0.000 claims 1
- -1 cyclic carbonic acid ester Chemical class 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 claims 1
- 238000006011 modification reaction Methods 0.000 claims 1
- 229960003371 protocatechualdehyde Drugs 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D317/00—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms
- C07D317/08—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3
- C07D317/44—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D317/46—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems condensed with one six-membered ring
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
BERLIN. ÜEDRUCKT IN DER REICHSDRUCKEBEi.
Claims (1)
- Patent-Anspruch:Abänderung des durch Patent 190788 geschützten Verfahrens zur Darstellung des cyklischen Kohlensäureesters vom Protokatechualdehyd, darin bestehend, daß man Dichlorpiperonal nicht mit den gemäß dem Hauptpatent zu verwendenden wasserfreien Säuren, die durch Anhydrisierung oder Zersetzung Wasser abgeben, sondern mit konzentrierter Schwefelsäure behandelt.3540
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE193543C true DE193543C (de) |
Family
ID=456766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT193543D Active DE193543C (de) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE193543C (de) |
-
0
- DE DENDAT193543D patent/DE193543C/de active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE193543C (de) | ||
| DE2819593C2 (de) | Verfahren zur rückstandsfreien Herstellung von α,ω-Diolen | |
| DE2041144A1 (de) | Verfahren zur Verminderung der Polymerisation | |
| DE585164C (de) | Verfahren zur Umkehrung des Drehungssinnes von optisch aktiven Phenylalkaminen | |
| DE347607C (de) | Verfahren zur Darstellung der Arylide von aromatischen Oxycarbonsaeuren | |
| DE112892C (de) | ||
| DE564365C (de) | Verfahren zur Herstellung von Schmelzkaese | |
| DE314943C (de) | ||
| DE250453C (de) | ||
| DE190674C (de) | ||
| DE229191C (de) | ||
| DE255953C (de) | ||
| DE252376C (de) | ||
| DE916412C (de) | Verfahren zur Herstellung von stabilen Loesungen von Glukosiden des Diaethylamino-aethyl-p-amino-benzoesaeureester-hydrochlorids | |
| DE2402354C2 (de) | Verfahren zur Herstellung von Oxamid | |
| DE285614C (de) | ||
| DE522569C (de) | Verfahren zur Herstellung von Schaumwein, insbesondere fuer Diabetiker | |
| DE688047C (de) | Verfahren zur Herstellung haltbarer waesseriger, therapeutisch verwendbarer Loesungen der Polyoxyalkylisoalloxazine | |
| DE463578C (de) | Verfahren zur Darstellung hexahydrierter N-Methylpyridin-3-carbonsaeureester | |
| DE695034C (de) | Verfahren zur Herstellung haltbarer Loesungen von p-Aminobenzolsulfonamid | |
| AT89800B (de) | Verfahren zur Konzentrierung wässeriger Essigsäuren. | |
| DE468020C (de) | Verfahren zum Konservieren von reinem AEther | |
| DE182691C (de) | ||
| DE272530C (de) | ||
| DE905851C (de) | Verfahren zur Herstellung von ª-Arylisopropylaminen und deren N-Substitutionsprodukten |