Neurosteroid Analogues. 9. Conformationally Constrained Pregnanes: Structure−Activity Studies of 13,24-Cyclo-18,21-dinorcholane Analogues of the GABA Modulatory and Anesthetic Steroids (3α,5α)- and (3α,5β)-3-Hydroxypregnan-20-one
作者:Xin Jiang、Brad D. Manion、Ann Benz、Nigam P. Rath、Alex S. Evers、Charles F. Zorumski、Steven Mennerick、Douglas F. Covey
DOI:10.1021/jm030302m
日期:2003.12.1
Likewise, for the enones, the order is delta(22)-24-one > delta(20(22))-23-one > delta(22)-20-one > delta(23)-22-one. Similar relative orders of potencies are also found in the other two bioassays. The activities of the 24-one and delta(22)-24-one compounds were expected to be very low, because the carbonyl group in these compounds is located over the steroid C-ring and oriented toward C-8. Instead, these
麻醉性类固醇(3alpha,5alpha)-和(3alpha,5beta)-3-hydroxypregan-20-one的D环上17beta-乙酰基中羰基部分的氢键受体性质是重要的部分麻醉类固醇药效团。制备在C-20,C-22,C-23或C-24上具有酮或共轭酮基的13,24-环18,21-二氟胆烷类化合物作为这些麻醉类固醇的构象约束类似物,并用于探测对于D环的氢键接受羰基的替代位置。评价了类似物(1)。在[(35)S]-叔丁基二环磷酸二硫代酸酯结合实验中,(2)。在电生理实验中使用在非洲爪蟾卵母细胞中表达的大鼠alpha(1)beta(2)gamma(2L)GABA(A)受体,以及(3)。作为t麻醉剂。在结合测定中,5alpha和5beta系列类似物的效力相对顺序是相同的。对于酮,顺序为24->> = 23-1> 20- 1> 22-1。同样,对于烯酮,顺序为delta(22)-24-one>