Synthesis and structure-activity relationships of new (5R,8R,10R)-ergoline derivatives with antihypertensive or dopaminergic activity

DOI: 10.1248/cpb.42.1463

Source and publish data:

Chemical and Pharmaceutical Bulletin p. 1463 - 1473 (1994)

Update date:2022-08-05

Topics: Synthesis Structure-activity relationships antihypertensive Dopaminergic

Authors:

Ohno Ohno

Adachi Adachi

Koumori Koumori

Mizukoshi

Nagasaka

Ichihara

Kato - Kato -

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Article abstract of DOI:10.1248/cpb.42.1463

A series of new (5R,8R,10R)-ergoline derivatives was synthesized, and their antihypertensive and dopaminergic activities were tested in conscious spontaneously hypertensive rats and in rats with unilateral 6- hydroxydopamine-induced lesions of the substantia nigra. (5R,8R,10R)-6- Alkyl-8-ergolinemethanols, prepared from the corresponding ergolinecarboxylates, were converted to the tosylates, which were treated with various five-membered heterocycles containing nitrogen atoms to afford the new ergolines. (5R,8R,10R)-8-(1,2,4-Triazol-1-ylmethyl)-6-methylergoline (4s, maleate: BAM-1110) exhibited potent dopaminergic activity, about 18- fold greater than that of bromocriptine mesylate. (5R,8R,10R)-8-(1,2,4- Triazol-1-ylmethyl)-6-propylergoline (8b, fumarate: BAM-1602) showed extremely potent dopaminergic activity, being about 220 and 1.15 times more active than bromocriptine mesylate and pergolide mesylate, respectively. Several compounds exhibited potent antihypertensive activity. Structure- activity relationships for antihypertensive and dopaminergic activities are discussed.

Full text of DOI:10.1248/cpb.42.1463

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