Exploiting an intramolecular Diels–Alder cyclization/dehydro-aromatization sequence for the total syntheses of ellipticines and calothrixin B
作者:Chengdan Deng、Yuancui Liu、Mei Xu、Kaiqiang Xie、Sheng Liu
DOI:10.1039/d0ob02527e
日期:——
and quinolinocarbazole alkaloids have been synthesized via a unified strategy. The prominent key step involved a Diels–Alder intramolecular cyclization/dehydro-aromatization sequence. From these carbazole-lactam cores, linear syntheses have been developed for ellipticines and calothrixin B.
Spermine Derivatives of Indole‐3‐carboxylic Acid, Indole‐3‐acetic Acid and Indole‐3‐acrylic Acid as Gram‐Negative Antibiotic Adjuvants
作者:Melissa M. Cadelis、Steven A. Li、Marie‐Lise Bourguet‐Kondracki、Marine Blanchet、Hana Douafer、Jean Michel Brunel、Brent R. Copp
DOI:10.1002/cmdc.202000359
日期:2021.2.4
antibiotic enhancing properties against a range of Gram‐negative bacteria, and for intrinsic antimicrobial, cytotoxic and haemolytic properties. Two spermine derivatives, bearing 5‐bromo‐indole‐3‐acetic acid (17) and 5‐methoxy‐indole‐3‐acrylic acid (14) end groups were found to exhibit good to moderate antibiotic adjuvant activities for doxycycline towards the Gram‐negative bacteria Pseudomonas aeruginosa