96450-55-4Relevant academic research and scientific papers
Aqueous N-methylmorpholine N-oxide as a new medium for alkylation of pyrazoles
Hasratyan, Ani H.,Alexanyan, Ashkharuhi G.,Khachatryan, Hasmik N.,Zakaryan, Geghetsik B.,Hayotsyan, Sargis S.,Danagulyan, Gevorg G.,Attaryan, Hovhannes S.
, p. 751 - 754 (2018/09/19)
[Figure not available: see fulltext.] It is shown that alkylation of pyrazoles with (E)/(Z)-1,3-dichlorobut-2-enes can be carried out in an alkaline aqueous medium in the presence of N-methylmorpholine N-oxide. In some cases, this technique may substitute
Synthesis of N-vinylpyrazoles
Attarian,Matsoyan,Martirosyan
, p. 452 - 455 (2007/10/03)
A method is proposed for the alkylation of pyrazoles with dichloroethane in water in the presence of the phase-transfer catalyst benzyltriethylammonium chloride (TEBAC). It was shown that dehydrochlorination of the corresponding N-(β-chloroethyl)pyrazoles in water under conditions of phase-transfer catalysis proceeds smoothly with the formation of N-vinylpyrazoles in 80-90% yield. 2005 Springer Science+Business Media, Inc.
New 1-(heterocyclylalkyl)-4-(propionanilido)-4-piperidinyl methyl ester and methylene methyl ether analgesics
Bagley,Thomas,Rudo,Spencer,Doorley,Ossipov,Jerussi,Benvenga,Spaulding
, p. 827 - 841 (2007/10/02)
A series of new 1-(heterocyclyalkyl)-4-(propionanilido)-4-piperidinyl methyl esters and methylene methyl ethers have been synthesized and pharmacologically evaluated. In the mouse hot-plate test, the majority of compounds exhibited an analgesia (ED50 1 mg/kg) superior to that of morphine. These studies revealed a pharmacological accommodation for many more structurally diverse and far bulkier aromatic ring systems than the corresponding components of the arylethyl groups of the prototypic methyl ester (carfentanil, 2) and methylene methyl ether (sufentanil, 3 and alfentanil, 4) 4-propionanilido analgesics. Compound 9A (methyl 1-[2-(1H-pyrazol-1-yl)-ethyl]-4-[(1-oxopropyl) phenylamino]-4-piperidinecarboxylate), which exhibited appreciable μ-opioid receptor affinity, was a more potent and short-acting analgesic, than alfentanil with less respiratory depression in the rat. On the other hand, the phthalimides 57A and 57B, which exhibited negligible affinity for opioid receptors associated with the mediation of nociceptive transmission (i.e., μ-, κ-, and δ-subtypes), displayed analgesic efficacy in all antinociception tests. In addition, while 57B, compared to clinical opioids, showed a superior recovery of motor coordination after regaining of righting reflex from full anesthetic doses in the rat rotorod test, 57A showed significantly less depression of cardiovascular function at supraanalgesic doses in the isoflurane-anesthetized rat.
