AN IMPROVED SYNTHETIC PROCEDURE FOR 6,6′-DIBROMOINDIGO (TYRIAN PURPLE)
摘要:
Tyrian purple was the most precious dye of antiquity. We describe a simple synthetic procedure that yields the actual dye, 6,6'-dibromoindigo 1, in considerably improved overall yield and of analytical purity, also being amenable to scale-up.
Diastereoselective Total Synthesis of Raputindole A
作者:Mario Kock、Thomas Lindel
DOI:10.1021/acs.orglett.8b02349
日期:2018.9.7
The first diastereoselective total synthesis of the bisindole alkaloid raputindole A is reported. After Au(I)-catalyzed assembly of the cyclopenta[f]indole tricycle, it was possible to hydrogenate the indene double bond regio- and diastereoselectively through iridium catalysis, guided by a preinstalled hydroxy function. Attempted HWE reaction led to formal elimination of formaldehyde from an α-quaternary
报道了双吲哚生物碱拉普吲哚A的第一个非对映选择性全合成。在Au(I)催化的环戊[ f ]吲哚三环的组装后,可以在预先安装的羟基官能团的引导下,通过铱催化将茚双键区域和非对映选择性地氢化。尝试的HWE反应导致从α-季环戊烷甲醛中甲醛的正式消除,而Takai烯烃化可避免甲醛的发生。在Suzuki-Miyaura交叉偶联和脱保护/氧化后,以13个线性步骤获得了(±)-raputindole A,总产率为18%。
Total Synthesis and Absolute Configuration of Raputindole A
作者:Mario Kock、Peter G. Jones、Thomas Lindel
DOI:10.1021/acs.orglett.7b03014
日期:2017.12.1
Suzuki–Miyaura cross-coupling, followed by a regioselective reduction employing LiDBB. Starting from 6-iodoindole, the sequence needs nine steps and provided (±)-raputindole A in 6.6% overall yield. The absoluteconfiguration of the natural product (+)-raputindole A was determined by quantum chemical calculation of the ECD spectrum.
据报道,从芸苔植物Raputia simulans中首次合成了双吲哚生物碱RaputindoleA 。关键步骤是Au(I)催化的环化反应,该反应由6烷基化的吲哚啉前体组装成环戊[ f ]吲哚三环。异丁烯基侧链通过Suzuki-Miyaura交叉偶联安装,然后使用LiDBB进行区域选择性还原。从6-碘吲哚开始,该序列需要九个步骤,并以6.6%的总收率提供了(±)-raputindoleA。天然产物(+)-raputindole A的绝对构型是通过ECD光谱的量子化学计算确定的。
Suvorov,N.N. et al., Journal of general chemistry of the USSR, 1962, vol. 32, p. 2325 - 2331
作者:Suvorov,N.N. et al.
DOI:——
日期:——
AN IMPROVED SYNTHETIC PROCEDURE FOR 6,6′-DIBROMOINDIGO (TYRIAN PURPLE)
作者:Peter Imming、Ingo Imhof、Matthias Zentgraf
DOI:10.1081/scc-100107023
日期:2001.1
Tyrian purple was the most precious dye of antiquity. We describe a simple synthetic procedure that yields the actual dye, 6,6'-dibromoindigo 1, in considerably improved overall yield and of analytical purity, also being amenable to scale-up.
Synthesis of the Indole-Based Inhibitors of Bacterial Cystathionine γ-Lyase NL1-NL3
作者:Konstantin V. Potapov、Roman A. Novikov、Maxim A. Novikov、Pavel N. Solyev、Yury V. Tomilov、Sergey N. Kochetkov、Alexander A. Makarov、Vladimir A. Mitkevich
DOI:10.3390/molecules28083568
日期:——
Staphylococcus aureus, Pseudomonas aeruginosa, etc. The suppression of bCSE activity considerably enhances the sensitivity of bacteria to antibiotics. Convenient methods for the efficient synthesis of gram quantities of two selective indole-based bCSE inhibitors, namely (2-(6-bromo-1H-indol-1-yl)acetyl)glycine (NL1), 5-((6-bromo-1H-indol-1-yl)methyl)- 2-methylfuran-3-carboxylic acid (NL2), as well as a synthetic