Regio- and Diastereoselective [3 + 2]-Spiroannulation of Benzoxazines with Chalcones: A Rh(III)-Catalyzed Redox-Neutral Approach to α-Aroyl Spiro-Indanamines
作者:Writhabrata Sarkar、Koushik Naskar、Shantonu Roy、Imtiaj Mondal、Sudip Karmakar、Aniket Mishra、Indubhusan Deb
DOI:10.1021/acs.joc.2c00974
日期:2022.8.5
We report an atom-economic Rh(III)-catalyzed [3 + 2]-spiroannulation reaction between cyclic ketimines and α,β-unsaturated carbonyl compounds, allowing the synthesis of novel spirocycles with concomitant generation of three stereogenic centers in one pot. The reaction does not require any silver additives or external oxidants and is believed to proceed in a redox-neutral manner. A broad substrate scope