作者:Yi Li、Anthony Linden、Manfred Hesse
DOI:10.1002/hlca.200390058
日期:2003.3
A convergent total synthesis of 13-hydroxyisocyclocelabenzine was developed. (3S)-Methyl 3-amino-3-phenylpropanoate (4) was used as the chiral building block. The 3,4-dihydro-4-hydroxyisoquinolin-1(2H)-one derivative (5), the key fragment for the total synthesis, was prepared by a novel base-catalyzed lactone-lactam ring enlargement (Scheme 3). The resulting target C(13) epimers 3a/3b from macrocyclization
开发了收敛的全合成13-羟基异环celabenzine。(3S)-3-氨基-3-苯基丙酸甲酯(4)用作手性构件。3,4-二氢-4-羟基异喹啉-1(2 H)-一衍生物(5)是整个合成的关键片段,它是通过新型的碱催化内酯-内酰胺环扩大制备的(方案3)。通过反复的快速色谱分离从大环化得到的靶C(13)差向异构体3a / 3b(方案4)。合成生物碱的绝对构型是通过X射线晶体结构分析确定的,这使我们能够确定绝对构型(9[ α ] D为正的天然3a的S,13 R)。