91265-68-8Relevant articles and documents
A new useful conversion method of naltrexone to 14-deoxynaltrexone
Osa, Yumiko,Ida, Yoshihiro,Yano, Yumiko,Furuhata, Kimio,Nagase, Hiroshi
, p. 271 - 282 (2008/02/10)
A novel synthetic method of 14-deoxynaltrexone (2), a μ-opioid receptor antagonist possessing a new message-structural part of opioid ligands, was established. Naltrexone methyl ether (5) was first converted to its acetal (24), followed by dehydration with thionyl chloride in pyridine to afford 8,14-dehydroderivative (26) of 24. The resulting unsaturated compound (26) was reduced with PtO2 under hydrogen to give saturated compound (27), which was then acid-hydrolyzed to afford the desired 14-deoxynaltrexone (23) (3-O-methyl of 2) without degradation of the naltrexone skeleton. The total yield from naltrexone (1) to 23 was 86%. Finally, 23 was demethylated to give 14-deoxynaltrexone (2) in 85% yield. This method provides a useful reaction route to give various important intermediates as a message part to synthesize selectives ligands for the opioid receptor subtypes.
Activities of morphinone and N-(cyclopropylmethyl)normorphinone at opioid receptors
Fang,Takemori,Portoghese
, p. 1361 - 1363 (2007/10/02)
Morphinone (3) and N-(cyclopropylmethyl)normorphinone (4) were synthesized and tested on electrically stimulated smooth muscle preparations (guinea pig ileum and mouse vas deferens) and in mice. Compound 3 behaved as an agonist and 4 as an antagonist in vitro and in vivo. No pronounced nonequilibrium agonist or antagonist activity was observed with either compound.
