Pharmacological discrimination between enantiomeric germanes by muscarinic receptors: a study on germanium/silicon bioisosterism
作者:Reinhold Tacke、Dirk Reichel、Peter G. Jones、Xue Hou、Magali Waelbroeck、Jan Gross、Ernst Mutschler、Günter Lambrecht
DOI:10.1016/0022-328x(96)06300-0
日期:1996.8
(R)-1a, (S)-1a, 3a and 5a with methyl iodide gave the corresponding methiodides rac-2a, (R)-2a, (S)-2a, 4a and 6a (1a → 2a, 3a → 4a, 5a → 6a). The absolute configuration of (R)-2a was determined by single-crystal X-ray diffraction. On the basis of the experimentally established absolute configuration of (R)-2a, the absolute configurations of all the other aforementioned optically active germanium compounds
(羟甲基)二有机(2-哌啶子基乙基)锗烷rac -Ph(c- Hex)Ge(CH 2 OH)CH 2 CH 2 NR 2(rac - 1a),Ph 2 Ge(CH 2 OH)CH 2 -CH 2从Cl 3 GeCH 2开始合成NR 2(3a)和(c -Hex)2 Ge(CH 2 OH)CH 2 CH 2 NR 2(5a)(NR 2 =哌啶子基)。Cl。使用O, O'-二-对甲苯甲酰基酒石酸的对映体作为拆分剂,通过rac - 1a的拆分获得1a的(R)-和(S)-对映异构体(通过非对映异构体盐的分步结晶拆分)。已显示1a的对映体的对映体纯度分别为至少98(1 H NMR)和97%ee(13 C NMR)(使用手性位移试剂的NMR研究)。的反应外消旋- 1A,(- [R )- 1A,(小号) -1a,3a和5a与甲基碘一起给出相应的甲硫氨酸rac - 2a,(R)-2a,(S)-2a,4a和6