Synthesis, in vitro acetylcholine-storage-blocking activities, and biological properties of derivatives and analogs of trans-2-(4-phenylpiperidino)cyclohexanol (vesamicol)
摘要:
Eighty-four analogues and derivatives of the acetylcholine-storage-blocking drug trans-2-(4-phenylpiperidino)-cyclohexanol (vesamicol) were synthesized, and their potencies were evaluated with the acetylcholine active-transport assay utilizing purified synaptic vesicles from Torpedo electric organ. The parent drug exhibits enantioselectivity, with (-)-vesamicol being 25-fold more potent than (+)-vesamicol. The atomic structure and absolute configuration of (+)-vesamicol were determined by X-ray crystallography. The absolute configuration of (-)-vesamicol is 1R,2R. Structure-activity evidence indicates that (-)-vesamicol does not act as an acetylcholine analogue. Alterations to all three rings can have large effects on potency. Unexpectedly, analogues locking the alcohol and ammonium groups trans-diequatorial or trans-diaxial both exhibit good potency. A potent benzovesamicol family has been discovered that is suitable for facile elaboration of the sort useful in affinity labeling and affinity chromatography applications. A good correlation was found between potencies as assessed by the acetylcholine transport assay and LD50 values in mouse.
An electrochemical approach for the selectivehydrogenation of aromatic hydrocarbons has been proposed. Detailed mechanistic studies indicate that the selectivity is attributed to combined effects of in situ released protons during anodic oxidation and significant differences in H+ mobility among various solvents.
提出了一种芳香烃选择性加氢的电化学方法。详细的机理研究表明,选择性归因于阳极氧化过程中原位释放的质子的综合作用以及各种溶剂之间 H +迁移率的显着差异。
Plieninger; Suhr, Chemische Berichte, 1956, vol. 89, p. 270,277
作者:Plieninger、Suhr
DOI:——
日期:——
Rowe; Davies, Journal of the Chemical Society, 1922, vol. 121, p. 1006