Scope of the Reactions of Indolyl- and Pyrrolyl-Tethered <i>N</i>-Sulfonyl-1,2,3-triazoles: Rhodium(II)-Catalyzed Synthesis of Indole- and Pyrrole-Fused Polycyclic Compounds
作者:Liangbing Fu、Huw M. L. Davies
DOI:10.1021/acs.orglett.7b00180
日期:2017.4.7
An efficient synthesis of tetrahydrocarboline-type products and polycyclic spiroindolines has been achieved. The transformation proceeds via rhodium(II)-catalyzed intramolecular annulations of indolyl- and pyrrolyl-tethered N-sulfonyl-1,2,3-triazoles. The reaction could be tuned toward either the formal [3 + 2] cycloaddition or the C–H functionalization reaction depending on the electronic and structural
Synthesis of Carbolines via Palladium/Carboxylic Acid Joint Catalysis
作者:Gianpiero Cera、Matteo Lanzi、Davide Balestri、Nicola Della Ca’、Raimondo Maggi、Franca Bigi、Max Malacria、Giovanni Maestri
DOI:10.1021/acs.orglett.8b01072
日期:2018.6.1
The combination of a Pd(0) complex with benzoic acid converts propargylic tryptamines to the corresponding tetrahydro-β-carbolines. The method uses unprotected indoles and affords the desired products with ample functional group tolerance. Detailed modeling studies reveal a close synergy between the organic and metal catalysts, which enables sequential alkyne isomerization, indole C–H activation, and
Exploration of a KI-catalyzed oxidation system for direct construction of bispyrrolidino[2,3-<i>b</i>]indolines and the total synthesis of (+)-WIN 64821
作者:Si-Kai Chen、Ju-Song Yang、Kun-Long Dai、Fu-Min Zhang、Xiao-Ming Zhang、Yong-Qiang Tu
DOI:10.1039/c9cc08646c
日期:——
reaction features an electrophilic “I+” mechanism, which is importantly quite different from and milder than the typical radical-involving process, and can be readily amplified for the totalsynthesis of (+)-WIN64821.
Copper-catalyzed cascade azidation–cyclization of tryptophols and tryptamines
作者:Panpan Zhang、Wangsheng Sun、Guofeng Li、Liang Hong、Rui Wang
DOI:10.1039/c5cc03964a
日期:——
The copper-catalyzed cascade azidation–cyclization of tryptophols and tryptamines has been developed.
铜催化的色胺酸酚和色胺的级联偶氮化-环化反应已经被开发出来。
Rhodium(I)-Catalyzed Cycloisomerization of Nitrogen-Tethered Indoles and Alkylidenecyclopropanes: Convenient Access to Polycyclic Indole Derivatives
作者:Di-Han Zhang、Xiang-Ying Tang、Yin Wei、Min Shi
DOI:10.1002/chem.201302331
日期:2013.10.4
At the end of its tether: A new synthetic protocol for the preparation of polycyclic indole derivatives has been developed from a rhodium(I)‐catalyzed cycloisomerization of a nitrogen‐tethered indole and alkylidenecyclopropane, affording the corresponding tetrahydro‐β‐carboline derivatives in moderate to good yields (see scheme). Further transformations give a direct and rapid route to tetracyclic