Synthesis, structural, conformational and pharmacological study of new fentanyl derivatives of the camphidine system
作者:B. Rico、E. Gálvez、M. L. Izquierdo、M. S. Arias、A. Orjales、A. Berisa、L. Labeaga
DOI:10.1002/jhet.5570310209
日期:1994.3
of the 4-anilidopiperidine analgesics in an attempt to study the influence of certain stereochemical factors on analgesia in this class of compounds. In deuteriochloroform and deuteriobenzene solution, compounds 4a-f display the same preferred conformation. The cyclopentane and piperidine rings adopt an envelope and distorted chair conformation respectively flattened at N-3, with the N and C-8 substituents
Synthesis and structural and conformational study of some esters derived from 8-β-hydroxy-3-phenethyl-3- azabicyclico [3.2.11] octan-8-α-carboxylic acid
A series of 8-beta-hydroxy-8-alpha-alkoxycarbonyl-N-phenethyl-3-azabicyclo[3.2.1]octane derivatives have been synthesized and studied by IR, H-1 and C-13 NMR spectroscopy, and the crystal structure of ethyl-8-beta-hydroxy-3-phenethyl-3-azabicyclo[3.2.1]octan-8-alpha-carboxylate (Va) has been determined by X-ray diffraction. In deuterochloroform and deuterobenzene the cyclopentane and piperidine rings of the title compounds shown an envelope conformation flattened at C8 and a distorted chair conformation puckered at C8 and flattened at N3, respectively, with the N-substituent in an equatorial position. These results are in close agreement with that found for compound Va in the crystalline state. By comparing the NMR and X-ray parameters of the title compounds with those of the corresponding 8-alpha-hydroxy-8-beta-alkoxycarbonyl-N-phenethyl-3-azabicyclo[3.2.1]octane epimers and 3-phenethyl-3-azabicyclo[3.2.1]octan-8-alpha-(and betol, several stereoelectronic effects have been deduced.
Synthesis and structural and conformational study of some esters derived from 8-α-hydroxy-3-phenethyl-3-azabicyclo [3.2.1] octan-8-β-carboxylic acid
3-phenethyl-3-azabicyclo[3.2.1]octane derivatives have been synthesized and studied by IR, 1 H and 13 C NMR spectroscopy, and the crystal structure of ethyl-8-α-hydroxy-3-azabicyclo[3.2.1]octane-8-β-carboxylate ( VI ) has been determined by X-ray diffraction. The compounds studied display in deuterochloroform and benzene- d 6 the same preferred chair-envelope conformation flattened at N-8 and puckered
摘要 合成了一系列 8-β-alcoxycarbonyl-8-α-hydroxy-3-phenethyl-3-azabicyclo[3.2.1]octane 衍生物,并通过 IR、 1 H 和 13 C NMR 光谱对其晶体结构进行了研究。 8-α-羟基-3-氮杂双环[3.2.1]辛烷-8-β-羧酸乙酯 (VI) 的 X 射线衍射测定。所研究的化合物在氘代氯仿和苯-d 6 中显示出相同的优选椅子-包络构象,在 N-8 处变平,在 C-3 处起皱,苯乙基和羟基均位于相对于哌啶环的赤道位置。这些结果与在结晶状态下发现的化合物 VI 的结果非常一致。通过将这些化合物的核磁共振参数与 3-苯乙基-3-氮杂双环 [3.2.1]octan-8-α-ol (VII) 的核磁共振参数进行比较,推导出了几种立体电子效应。