Aporphines. 48. Enantioselectivity of (R)-(-)- and (S)-(+)-N-n-propylnorapomorphine on dopamine receptors
作者:John L. Neumeyer、Dirk Reischig、George W. Arana、Alexander Campbell、Ross J. Baldessarini、Nora S. Kula、Keith J. Watling
DOI:10.1021/jm00358a011
日期:1983.4
also was converted to (RS)-N-n-propylnorapomorphine dimethyl ether by dehydrogenation of the 10,11-O,O'-dimethyl ether of (R)-NPA with 10% palladium on carbon in acetonitrile, followed by reduction with sodium cyanoborohydride under acidic conditions. Alternatively (RS)-NPA 10,11-O,O'-dimethyl ether was obtained via total synthesis. (+)-Dibenzoyl-D-tartaric acid was used to resolve (RS)-NPA dimethyl
合成了Nn-丙基norapomorphine(NPA)的对映体[(S)-(+)和(R)-(-)]。(R)-NPA通过Nn-丙基去甲吗啡的酸催化重排获得。(R)-NPA也通过将(R)-NPA的10,11-O,O'-二甲醚与10%钯/碳在乙腈中脱氢而转化为(RS)-Nn-丙基诺拉吗啡二甲醚,然后在酸性条件下用氰基硼氢化钠还原。或者,通过全合成获得(RS)-NPA 10,11-O,O′-二甲基醚。使用(+)-二苯甲酰基-D-酒石酸来解析(RS)-NPA二甲醚。醚裂解得到的(S)-NPA盐酸盐盐的分离纯度大于99.9%,这是通过圆二色性(CD)光谱测定的。(S)-和(R)-NPA的药理活性用亚纳摩尔浓度的3H标记的阿扑吗啡(APO),ADTN和螺哌啶醇(SPR)评估与小腿尾状核富含膜的突触核蛋白级分的结合竞争。(R)-NPA对(S)-NPA的IC50(nM)值如下:[3H] APO,2.5对66;[3H]