Synthesis of 3,3-Spirocyclic 2-Phosphonoindolines via a Dearomative Addition of Phosphonyl Radicals to Indoles
作者:Dmytro Ryzhakov、Maxime Jarret、Jean-Pierre Baltaze、Régis Guillot、Cyrille Kouklovsky、Guillaume Vincent
DOI:10.1021/acs.orglett.9b01516
日期:2019.7.5
The diastereoselective synthesis of α-amino phosphonate derivatives embedded in spirocyclic indolines is reported. The present method proceeds via the dearomative addition of phosphonyl radicals at the C2-position of the indole nucleus in oxidative conditions followed by the intramoleculartrapping of the resulting carbocation before rearomatization. trans-3,3-Spirocyclic 2-phosphonoindolines were
A facile approach to spirocyclic 2-azido indolines via azidation of indoles with ceric ammonium nitrate
作者:Jing Li、Mao Liu、Qi Li、Hua Tian、Yian Shi
DOI:10.1039/c4ob01549e
日期:——
This paper describes azidation of indoles with NaN3 and ceric ammonium nitrate (CAN), giving a variety of spirocyclic 2-azido indolines in good yields and moderate diastereoselectivities.