The Absolute Configuration of (+)-Oxopropaline D by Theoretical Calculation of Specific Rotation and Asymmetric Synthesis.
作者:Takeshi Kuwada、Miyako Fukui、Toshiyuki Hata、Tominari Choshi、Junko Nobuhiro、Yukio Ono、Satoshi Hibino
DOI:10.1248/cpb.51.20
日期:——
The specific optical rotations of (R)-oxopropaline D calculated by two ab initio MO methods were +52+/-31 degrees and +61+/-29 degrees, respectively, and (+)-oxopropaline D (3) was presumed to have an R-configuration. On the basis of this theoretical result, the reaction of 1-litio-beta-carboline with (R)-glyceraldehyde acetonide followed by oxidation with MnO(2) gave (R)-oxopropaline D acetonide (4a)
通过两种从头算MO方法计算的(R)-氧代脯氨酸D的比旋光度分别为+52 +/- 31度和+61 +/- 29度,并且(+)-氧代脯氨酸D(3)推定为具有R配置。根据此理论结果,1-litio-beta-carboline与(R)-甘油醛丙酮化物的反应,然后用MnO(2)氧化,得到(R)-氧代丙氨酸D丙酮化物(4a),与以前在各个方面都合成过(+)-氧代丙氨酸D丙酮化物(4)。从理论计算和实验合成的结果,我们确定天然(+)-氧代丙胺D(3)具有R-构型。