Enantioselective Total Synthesis of Desbromoarborescidines A–C and the Formal Synthesis of (<i>S</i>)-Deplancheine
作者:Pravat Mondal、Narshinha P. Argade
DOI:10.1021/jo401079v
日期:2013.7.5
Starting from Boc-protected tryptamine and (S)-tetrahydro-5-oxo-2-furancarboxylic acid, facile enantioselective total synthesis of desbromoarborescidines A–C and the formal synthesis of (S)-deplancheine have been accomplished via a common intermediate (S)-indolo[2,3-a]quinolizine. Synthesis of enantiomerically pure (S)-acetoxyglutarimide, stereoselective reductive intramolecular cyclization, hydroxyl
从Boc-保护的色胺和(起始小号) -四氢-5-氧代-2-呋喃甲酸,desbromoarborescidines A-C和(正式合成的容易对映选择性全合成小号)-deplancheine已经通过一个共同的中间体(已经完成小号)-吲哚并[2,3- a ]喹诺嗪。对映体纯的(S)-乙酰氧基戊二酰亚胺的合成,立体选择性还原分子内环化,羟基辅助的原位N -Boc脱保护,黄原酸酯的选择性脱氧和内酰胺水解,然后在分子内环化中适当交换氮区域选择性。决定性的步骤。