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Chloropyridines are important intermediates to pharmaceuticals and agrochemicals. [1] A major use of 2-chloropyridine is the production of production of the fungicide pyrithione. Reaction of 4-chloropyridine with thioglycolic acid gives pyridylmercaptoacetic acid, a step in the production of cephalosporin antibiotics.
Acylsulfonamide is a functional group in organic chemistry that is sometimes used in medicinal chemistry. [1] It consists of a sulfonamide group (SO 2 NH) linked to an acyl group (RCO), forming the structure R 1-CO-NH-SO 2-R 2. This moiety is found in several biologically active molecules and marketed drugs, serving as an useful pharmacophore. [2]
2,6-Dichloropyridine is a chloropyridine with the formula C 5 H 3 Cl 2 N. A white solid, it is one of six isomers of dichloropyridine. It serves as a precursor to the antibiotic enoxacin, [2] as well as the drug and anpirtoline and the antifungal liranaftate.
2-Chloropyridine is an aryl chloride with the formula C 5 H 4 ClN. It is a colorless liquid that is mainly used to generate fungicides and insecticides in industry. It also serves to generate antihistamines and antiarrythymics for pharmaceutical purposes. [2] It is one of three isomers of chloropyridine.
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The reaction of 3-bromo-4-chloropyridine with furan and lithium amalgam gives 1,4-epoxy-dihydroquinoline through the 2,3-pyridyne intermediate. The reaction of 4-bromopyridine with sodium in liquid ammonia gives both 3-aminopyridine and 4-aminopyridine through the 3,4-pyridyne intermediate and an E1cB-elimination reaction .
The standards that are in effect since 1 December 2010, [4] are the Indian Pharmacopoeia 2010 (IP 2010). The Pharmacopoeia 2014 was released by Health Minister Ghulam Nabi Azad on 4 November 2013. [5] The Pharmacopoeia 2018 was released by Secretary, Ministry of Health & Family Welfare, Government of India. [5]