NMR研究紫菀中两个酚性化合物的结构及立体化学

STRUCTURE AND STEREOCHEMISTRY ANALYSIS OFTWO cOMPOUNDS FROM ASTER TATARICUS BY NMR

本文综合利用各种ＮＭＲ技术研究了紫菀中两个酚性化合物的结构及立体化学．利用相敏ＣＯＳＹ解析了相互重叠的强偶合体系，并结合分子力学计算讨论了化合物Ⅰ的构象．

he structure and stereochemistry of two plienolic compounds from aster tataricuswcre determined employing a variety of NMR experiments. Phase-sensitive COSY ex-periment was sunasfully used to resolve the crowded, strong coupled spin systems.The conformation of compound Ⅰ was discussed with the aid of molecular mecha-nism calculations.