Palladium-Catalyzed Synthesis of Pyrayaquinones, Murrayaquinones, and Murrayafoline-B
作者:Hans-Joachim Knölker、Sebastian Kutz、Arndt Schmidt
DOI:10.1055/s-0036-1588322
日期:——
the total synthesis of murrayafoline-B and seven carbazole-1,4-quinone alkaloids. A palladium(II)-catalyzed oxidative cyclization is used to construct the carbazole skeleton. Pyran annulation and oxidation provide pyrayaquinone-A, -B, and -C. DIBAL-H-promoted reductive ring opening of pyrano[3,2-a]carbazole precursors leads to the prenylated and geranylated carbazole-1,4-quinone alkaloids murrayaquinone-B
献给教授迪特尔·恩德斯在他70之际个生日。 抽象的 我们描述了murrayafoline-B和七个咔唑-1,4-醌生物碱的总合成。钯(II)催化的氧化环化反应可用于构建咔唑骨架。吡喃环化和氧化提供吡喃醌-A,-B和-C。吡喃并[3,2- a ]咔唑前体的DIBAL-H促进的还原开环会导致异戊烯基和Geranylated咔唑-1,4-醌生物碱murrayaquinone-B,-C,-D和-E,并导致murrayafoline- B. 我们描述了murrayafoline-B和七个咔唑-1,4-醌生物碱的总合成。钯(II)催化的氧化环化反应可用于构建咔唑骨架。吡喃环化和氧化提供吡喃醌-A,-B和-C。吡喃并[3,2- a ]咔唑前体的DIBAL-H促进的还原开环会导致异戊烯基和Geranylated咔唑-1,4-醌生物碱murrayaquinone-B,-C,-D和-E,并导致murrayafoline-