react with alkynoic acids (AAs) to achieve gold‐catalyzed highly selective cascade reactions to furnish novel indole‐fused skeletons. Furthermore, with this powerful gold catalytic system, a library of indole/pyrrole/thiophene/benzene/naphthalene/pyridine‐based nitrogen‐containing heterocyclic compounds (NCHCs) with scaffold diversity and molecular complexity was constructed rapidly using various amine
Gold-catalyzed tandem reaction in water: an efficient and convenient synthesis of fused polycyclic indoles
作者:Enguang Feng、Yu Zhou、Fei Zhao、Xianjie Chen、Lei Zhang、Hualiang Jiang、Hong Liu
DOI:10.1039/c2gc35293a
日期:——
This report describes the gold-catalyzed synthesis of fused polycyclic indoles from substituted 2-(1H-indol-1-yl) alkylamines and alkynoic acids in waterundermicrowaveirradiation. This protocol proceeds in high atom economy and leads to the generation of two rings, together with the formation of one new C–C bond and two new C–N bonds in a single operation. The advantages of the method include a
Scaffold Tailoring by a Newly Detected Pictet–Spenglerase Activity of Strictosidine Synthase: From the Common Tryptoline Skeleton to the Rare Piperazino-indole Framework
(STR1) has been recognized as a key enzyme in the biosynthesis of some 2000 indolealkaloids in plants, some with high therapeutic value. In this study, a novel function of STR1 has been detected which allows for the first time a simple enzymatic synthesis of the strictosidine analogue 3 harboring the piperazino[1,2-a]indole (PI) scaffold and to switch from the common tryptoline (hydrogenated carboline)
scope. In addition, this is the first example of the generation of an indole/thiophene/pyrrole/pyridine/naphthalene/benzene-fused N-heterocycle library through gold catalysis in water from readily available materials. Notably, the discovery of antibacterial molecules from this library demonstrates its high quality and potential for the identification of active pharmaceutical ingredients.