HAINING CG, JOHNSTON RG, SMITH JM. The neuromuscular blocking properties of a series of bis-quaternary tropeines.
BRITISH JOURNAL OF PHARMACOLOGY AND CHEMOTHERAPY 1998;
15:71-81. [PMID:
14398886 PMCID:
PMC1481991 DOI:
10.1111/j.1476-5381.1960.tb01212.x]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Linkage of two tropine esters through their nitrogen atoms by the chain -[CH(2)](m)-O-CO-[CH(2)](n)-CO-O-[CH(2)](m)-, in which m was 2 or 3 and n varied from 0 to 6, gave compounds which produced neuromuscular block without depolarization. Reversibility be neostigmine was confirmed for a few compounds. Potency was found to depend upon the tropine ester employed and upon the values of n and m. Short duration and hypotensive properties were favoured by the higher values of n. The duration of action of the compound based on the phenylacetic acid ester of tropine, in which n=4 and m=2, varied considerably in different species. Epimerization, in which the relative positions of the methyl group and the linking chain on the quaternary tropane nitrogen atom were reversed, did not produce subtances having more favourable properties than those possessed by the unepimerized compounds.
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