GB703302A - Preparation of an erythro propane diol - Google Patents
Preparation of an erythro propane diolInfo
- Publication number
- GB703302A GB703302A GB8577/52A GB857752A GB703302A GB 703302 A GB703302 A GB 703302A GB 8577/52 A GB8577/52 A GB 8577/52A GB 857752 A GB857752 A GB 857752A GB 703302 A GB703302 A GB 703302A
- Authority
- GB
- United Kingdom
- Prior art keywords
- effected
- erythro
- caustic
- phthalimidoacetaldehyde
- condensation
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/02—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom condensed with one carbocyclic ring
- C07D209/44—Iso-indoles; Hydrogenated iso-indoles
- C07D209/48—Iso-indoles; Hydrogenated iso-indoles with oxygen atoms in positions 1 and 3, e.g. phthalimide
Abstract
In the process of the parent Specification for the manufacture of DL-erythro-2-o-carboxybenzamido-1-p-nitrophenylpropane-1:3-diol, the initial step of condensing p-nitrobenzaldehyde with a -phthalimidoacetaldehyde to produce 1-(p-nitrophenyl)-1-hydroxy-2-phthalimidopropan -3-al (in the form of an addition product with a -phthalimidoacetaldehyde) is effected in the presence of a caustic alkali. The condensation may be effected by adding the caustic alkali (preferably as a 2-10N aqueous solution) to a solution of the two reactants in an organic solvent, preferably at 0-10 DEG C., the addition being desirably stopped when the temperature has risen several degrees in order to avoid the presence of excess alkali which would partially hydrolyse the phthalimido group. In examples, the condensation is effected in dioxane in the presence of: (1) and (4) caustic soda; (2) lithium hydroxide; (3) caustic potash.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR703302X | 1951-04-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB703302A true GB703302A (en) | 1954-02-03 |
Family
ID=9061190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8577/52A Expired GB703302A (en) | 1951-04-13 | 1952-04-03 | Preparation of an erythro propane diol |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB703302A (en) |
-
1952
- 1952-04-03 GB GB8577/52A patent/GB703302A/en not_active Expired
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