Loratadine,wholesale Loratadine API Intermediates Cas 79794-75-5
Loratadine is a zwitterionic feature in the molecular structure of second-generation antihistamines, so that it has no significant central inhibition. This pharmaceutical intermediate can be used clinically to prevent and treat diseases such as allergic rhinitis, chronic idiopathic urticaria, allergic asthma and specific dermatitis. Compared with the first generation of antihistamines, one of its major properties is the absence of sleepiness.
Loratadine API Intermediates Cas 79794-75-5
CAS NO: 79794-75-5
EC NO: /
Molecular Formula: C22H23ClN2O2
Molecular Weight: 382.89
Appearance and traits: white powder
Density: 1.261 g/cm3
Melting point: 134-136 ° C
Boiling point: 531.3oCat 760 mmHg
Flash point: 275.1oC
Stability: Stable, but may be heat sensitive - refrigerate. Incompatible with strong oxidizing agents.
Storage conditions: 2-8oC
Ethyl 4- (8-chloro-5,6-dihydro-11H-benzo [5,6] cyclohepta [1,2-b] pyridin-11- ylidene) -1- piperidinecarboxylate;
4-(8-Chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene-1-piperidinecarboxylic acid ethyl ester;
4-(8-Chloro-5,6-diamino-11H-benzocycloheptidyl-11-ylidene)-1-methylpiperidine was dissolved in toluene, and then ethyl chloroformate was added dropwise. After the reaction is completed, water is added, and the benzene layer is separated. Then washed with water, dried and concentrated under reduced pressure to give an oil. After being impregnated with ether, it is recrystallized to obtain loratadine.
It is an antihistamine drug with high selectivity to peripheral nerve H1 receptors, strong action and long time. It is a long-acting tricyclic antihistamine that competitively inhibits histamine H1 receptor and inhibits allergic symptoms caused by histamine. This drug has no significant anticholinergic and central inhibitory effects. It is used to relieve symptoms associated with allergic rhinitis and to alleviate the symptoms of chronic urticaria and other allergic skin diseases.