Physovenines: Efficient Synthesis of (?)- and (+)-Physovenine and Synthesis of Carbarnate Analogues of (?)-Physovenine. Anticholinesterase Activity and Analgesic Properties of Optically Active Physovenines
作者:Qian-sheng Yu、Chi Liu、Margareth Brzostowska、Linda Chrisey、Arnold Brossi、Nigel H. Greig、John R. Atack、Timothy T. Soncrant、Stanley I. Rapoport、Hans-Eckart Radunz
DOI:10.1002/hlca.19910740409
日期:1991.6.19
Column chromatography of easy available (±)-physovenine (2) on cellulose triacetate afforded (−)- and (+)-physovenine (2a and 2b, resp.). Alkaloids 2a, b required for pharmacological testing were prepared from eserolincs (3a, b) by an improved procedure. Natural (−)-physovenine (2a) was equally potent in inhibiting AChE and BChE in vitro as natural physostigmine (1a), and twice as potent as the unnatural
容易获得的(±)-植物静脉素(2)在三乙酸纤维素上的柱色谱分离得到(-)-和(+)-植物静脉素(2a和2b,分别)。通过改进的方法,从塞洛辛(3a,b)制备了药理学测试所需的生物碱2a,b。天然(-)-植物蛇毒(2a)在体外抑制AChE和BChE的效力与天然毒扁豆碱(1a)相同,是抗AChE的非天然对映体2b的两倍,抗BChE的效力是其14倍。2a的几种氨基甲酸酯类似物在这些测定中,它们的效力至少与前一种化合物相同。测试的化合物均未结合不同的阿片受体或5-羟色胺受体制剂。大多数测试的化合物在Writhing测试中均具有相当大的镇痛活性。