Aminobenzaldehydes
| Aminobenzaldehydes | |||
| Surname | 2-aminobenzaldehyde | 3-aminobenzaldehyde | 4-aminobenzaldehyde |
| other names |
o -aminobenzaldehyde anthranilaldehyde |
m -aminobenzaldehyde |
p -aminobenzaldehyde |
| Structural formula |
|
|
|
| CAS number | 529-23-7 | 1709-44-0 | 556-18-3 |
| ECHA InfoCard | 100.007.687 | 100.015.426 | 100.008.288 |
| PubChem | 68255 | 74366 | 11158 |
| Molecular formula | C 7 H 7 NO | ||
| Molar mass | 121.14 g mol −1 | ||
| Physical state | firmly | ||
| Melting point | 40 ° C | 72 ° C | |
| boiling point | |||
|
GHS labeling |
- | ||
| H and P phrases | - | ||
| - | |||
| - | |||
In chemistry , the aminobenzaldehydes form a group of substances that are derived from both benzaldehyde and aniline . The structure consists of a benzene ring with attached aldehyde (–CHO) and amino (–NH 2 ) groups as substituents . Their different arrangement results in three constitutional isomers . The 2-aminobenzaldehyde is rarely mentioned under its common name anthranilaldehyde .
presentation
2-aminobenzaldehyde is prepared from 2-nitrobenzaldehyde by reduction with iron (II) sulfate and HCl. 4-aminobenzaldehyde is prepared from 4-nitrotoluene by reacting it with sodium sulfide and sulfur in aqueous sodium hydroxide solution and ethanol .
Individual evidence
- ↑ a b CRC Handbook of Tables for Organic Compound Identification , Third Edition, 1984, ISBN 0-8493-0303-6 .
- ↑ Lee Irvin Smith and JW Opie: o-Aminobenzaldehyde In: Organic Syntheses . 28, 1948, p. 11, doi : 10.15227 / orgsyn.028.0011 ; Coll. Vol. 3, 1955, p. 56 ( PDF ).
- ^ E. Campaigne, WM Budde, and GF Schaefer: p-Aminobenzaldehyde In: Organic Syntheses . 31, 1951, p. 6, doi : 10.15227 / orgsyn.031.0006 ; Coll. Vol. 4, 1963, p. 31 ( PDF ).