| Identification | More | [Name]
2-Chloro-1-methylpyridinium iodide | [CAS]
14338-32-0 | [Synonyms]
2-CHLORO-1-METHYLPYRIDINIUM IODIDE
2-CHLORO-N-METHYLPYRIDINIUM IODIDE
CMPI
N-Methyl-2-chloropyridinium iodide~Mukaiyamas
N-Methyl-2-chloropyridiniumiodide
2-CHLORO-N-METHYLPYRIDINIUM IODIDE (CMPI)
Pyridinium, 2-chloro-1-methyl-, iodide
CMPI 2-CHLORO-1-METHYLPYRIDINIUM IODIDE
2-CHLORO-1-METHYLPYRIDINIUM IODIDE 97% | [EINECS(EC#)]
238-288-7 | [Molecular Formula]
C6H7ClIN | [MDL Number]
MFCD00011984 | [Molecular Weight]
255.48 | [MOL File]
14338-32-0.mol |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S24/25:Avoid contact with skin and eyes .
S36:Wear suitable protective clothing . | [RIDADR ]
1759 | [WGK Germany ]
3
| [F ]
8-21 | [HazardClass ]
8 | [PackingGroup ]
III | [HS Code ]
29333999 |
| Hazard Information | Back Directory | [Chemical Properties]
yellow crystalline solid | [Uses]
Condensation reagent for the synthesis of esters and ketenes, and for the kinetic resolution of carboxylic acids and alcohols. | [General Description]
2-Chloro-1-methylpyridinium iodide (Mukaiyama reagent), is a commonly used reagent in organic synthesis for the activation of the hydroxy group of alcohols and carboxylic acids. It is used to synthesize derivatives of esters, lactones, amides, lactams, and ketenes from the corresponding carboxylic acids. It is also used as an efficient coupling reagent in the synthesis of peptides because of its low toxicity, simple reaction conditions, and also less expensive than EDC. | [Purification Methods]
Purify it by dissolving in EtOH and adding dry Et2O. The solid is washed with Me2CO and dried at 20o/0.35mm. Store it in the dark. Attempted recrystallisation from Me2CO/EtOH/pet ether (b 40-60o) causes some exchange of the Cl substituent by I. The picrate has m 106-107o, and the perchlorate has m 212-213o. [Jones et al. J Am Chem Soc 111 1157 1989, UV and solvolysis: Barlin & Benbow J Chem Soc, Perkin Trans 2 790 1974, Beilstein 20/5 V 405.] |
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