作者:Zdenko Hameršak、Ana Selestrin、Andreja Lesac、Vitomir Šunjić
DOI:10.1016/s0957-4166(98)00162-1
日期:1998.6
diastereomeric amides (4A,B–6A,B) of (1S,3R)-camphanic acid (lactone of 1-hydroxy-2,2,3-trimethylcyclopentan-1,3-dicarboxylic acid, (−)-camphanic acid 9) with α-arylethylamines 1–3 are deduced from 1H NMR data and MM2 calculations. The α-arylethyl group in diastereomers A and B adopt nearly opposite absolute conformations, stabilized by hydrogen bonding in the syn-oriented O–C(1)–C(6)–N–H unit, and repulsive
的绝对构型和非对映酰胺的构型(图4A,乙- 6A,乙的)(1小号,3 - [R )的1-羟基-2,2,3- trimethylcyclopentan -1,3-二羧酸-camphanic酸(内酯, ( - ) -莰烷酸9)用α-芳乙胺1 - 3从推导出1个H NMR数据和MM2计算。非对映异构体A和B中的α-芳基乙基具有几乎相反的绝对构象,并通过在合成物中的氢键稳定取向的OC(1)-C(6)-NH单元,以及1'C-Me组和酰胺CO组之间的排斥相互作用。绝对构型(1'小号)被分配给图4A - 6A非对映体,和(1' - [R )-构型到4B - 6B非对映体; 通过分别从对映体纯的(1 'S)-α-芳基乙胺1和2制备4A和5A证实了这种归属。这些结果还使pro- R(H R)和pro- S(H S)质子在苄基衍生物7。