(-)-protubonine A 和 (-)-protubonine B 的拟议结构,它们是从海洋来源的真菌 Aspergillus sp. 中分离的吡咯烷并吲哚啉二酮哌嗪生物碱。SF-5044 已合成,对应于天然分离物的非对映异构体。本文中的全合成将生物碱的立体结构确定为所声称结构的 C-11 差向异构体。
DOI:
10.1002/ejoc.201400029
作为产物:
描述:
benzyl (N-(2S,3aR,8aR)-3a-acetoxy-8-acetyl-1,2,3,3a,8,8a-hexahydropyrrolo[2,3-b]indole-2-carbonyl)-L-leucinate 在
溶剂黄146 作用下,
反应 8.5h,
以73%的产率得到(-)-protubonine B
参考文献:
名称:
通过吲哚的串联碘环化/乙酰氧基化一步构建乙酰氧基吡咯并吲哚骨架
摘要:
已经开发了一种通过PhI(OAc) 2 / n Bu 4 NI 介导的串联碘环化/乙酰氧基化合成C3a乙酰氧基六氢吡咯并[2,3- b ]吲哚衍生物的方法。新开发的合成策略的特点是在温和的反应条件下单步组装各种 C3a 乙酰氧基化四氢吡咯、四氢呋喃和内酯稠合的二氢吲哚,从而能够有效地不对称合成 (-)-protubonine B。
An environmentally friendly protocol for oxidative halocyclization of tryptamine and tryptophol derivatives
作者:Jun Xu、Rongbiao Tong
DOI:10.1039/c7gc01341h
日期:——
environmentally friendly and efficient protocol (KX/oxone) for oxidative halocyclization of tryptamine/tryptophol derivatives was developed and demonstrated with 28 examples and concisetotalsynthesis of cyclotryptamine alkaloid protubonines A and B. The distinct advantage of this protocol over all previous methods is that no organic byproduct is generated from a halogenating agent or oxidant, thus greatly reducing
Total Synthesis and Structural Revision of (-)-Protubonine A and (-)-Protubonine B
作者:Paula Lorenzo、Rosana Álvarez、Ángel R. de Lera
DOI:10.1002/ejoc.201400029
日期:2014.4
The proposed structures of (–)-protubonine A and (–)-protubonine B, which are pyrrolidinoindoline diketopiperazine alkaloids that were isolated from the marine-derived fungus Aspergillus sp. SF-5044, have been synthesized and correspond to diastereomers of the natural isolates. The total syntheses, herein, established the stereostructures of the alkaloids as the C-11 epimers of the purported structures
(-)-protubonine A 和 (-)-protubonine B 的拟议结构,它们是从海洋来源的真菌 Aspergillus sp. 中分离的吡咯烷并吲哚啉二酮哌嗪生物碱。SF-5044 已合成,对应于天然分离物的非对映异构体。本文中的全合成将生物碱的立体结构确定为所声称结构的 C-11 差向异构体。
Single-step construction of an acetoxypyrroloindole skeleton <i>via</i> tandem iodocyclization/acetoxylation of indoles
A method for the synthesis of C3a acetoxy hexahydropyrrolo[2,3-b]indole derivatives via a PhI(OAc)2/nBu4NI mediated tandem iodocyclization/acetoxylation has been developed. The newly developed synthetic strategy features the single-step assembly of various C3a acetoxylated tetrahydropyrrole-, tetrahydrofuran-, and lactone-fused indolines under mild reaction conditions, which enabled efficient asymmetric
已经开发了一种通过PhI(OAc) 2 / n Bu 4 NI 介导的串联碘环化/乙酰氧基化合成C3a乙酰氧基六氢吡咯并[2,3- b ]吲哚衍生物的方法。新开发的合成策略的特点是在温和的反应条件下单步组装各种 C3a 乙酰氧基化四氢吡咯、四氢呋喃和内酯稠合的二氢吲哚,从而能够有效地不对称合成 (-)-protubonine B。