描述了最初提出的 protoaculeine B 结构的合成研究。从 DL-色氨酸开始,分别经过 8 步和 16 步立体选择性合成了两种适当保护的杂三环亚基候选物。此外,最终合成的两种杂三环氨基酸非对映异构体被发现具有神经活性:(9 S *,11 S *)-异构体过度活跃,而非对映异构体 (9 S *,11 R *)-异构体对小鼠脑室内活性低下。注射。
描述了最初提出的 protoaculeine B 结构的合成研究。从 DL-色氨酸开始,分别经过 8 步和 16 步立体选择性合成了两种适当保护的杂三环亚基候选物。此外,最终合成的两种杂三环氨基酸非对映异构体被发现具有神经活性:(9 S *,11 S *)-异构体过度活跃,而非对映异构体 (9 S *,11 R *)-异构体对小鼠脑室内活性低下。注射。
A synthetic strategy for accessing protoaculeine B (1), the N-terminal amino acid of the highly modified peptide toxin aculeine, was developed via the synthesis of the fully protected natural homologue of 1 with a 12-mer poly(propanediamine). The synthesis of mono(propanediamine) analog 2, as well as core amino acid 3, was demonstrated by this strategy. New amino acid 3 induced convulsions in mice;
A biomimetic synthesis of homofascaplysin C from ditryptophans
作者:Mei Xu、Rui An、Tao Huang、Xiao-jiang Hao、Sheng Liu
DOI:10.1016/j.tetlet.2016.02.014
日期:2016.3
A route for the biomimetic synthesis of homofascaplysin C has been established. The key strategy is based on the chemoselective and sequential oxidative cleavage of two side-chains of the ditryptophan precursor.
Catalytic Transfer Hydrogenation of Indoles to Indolines in Formic Acid
作者:Yasuo Kikugawa、Masato Kashimura
DOI:10.1055/s-1982-29946
日期:——
A biomimetic method to synthesise indolo[3,2-a]carbazoles
作者:Li-na Liang、Tian-yun Fan、Tao Huang、Chen Yan、Mei Xu、Sheng Liu
DOI:10.1016/j.tetlet.2014.11.136
日期:2015.1
A simple and biomimetic synthetic strategy for indolo[3,2-a]carbazoles has been developed. Our approach involved the efficient conversion of 2-(3'-indolyl)tryptophan derivatives into the corresponding cc-keto esters and the subsequent aromatic cyclisation of these intermediates to construct the characteristic heteroaryl-condensed carbazole core. (C) 2014 Elsevier Ltd. All rights reserved.