In(OTf)<sub>3</sub>-catalysed one-pot versatile pyrrole synthesis through domino annulation of α-oxoketene-N,S-acetals with nitroolefins
作者:Abhijeet Srivastava、Gaurav Shukla、Anugula Nagaraju、Girijesh Kumar Verma、Keshav Raghuvanshi、Raymond C. F. Jones、Maya Shankar Singh
DOI:10.1039/c4ob00781f
日期:——
In(OTf)3-catalyzed robust and sustainable one-pot access to previously unknown and synthetically demanding polysubstituted pyrroles via [3 + 2] annulation of α-oxoketene-N,S-acetals with β-nitrostyrenes has been achieved under solvent-free conditions. The merit of this domino Michael addition/cyclization sequence is highlighted by its operational simplicity, short reaction time (5–10 min), good to
Copper-catalyzed one-pot synthesis of α-functionalized imidates
作者:Ralph Husmann、Yun S. Na、Carsten Bolm、Sukbok Chang
DOI:10.1039/c0cc00941e
日期:——
A four-component, one-pot procedure gives access to α-functionalized imidates starting from readily available terminal alkynes, sulfonyl azides, alcohols and nitroalkenes using a copper catalyst and triethylamine as a base under mild conditions.
Schreiner's Thiourea Promoted [2+2] Cycloaddition of Captodative Azetidinones and Nitroolefins
作者:Zoltán Dobi、Tamás Holczbauer、Tibor Soós
DOI:10.1002/ejoc.201601524
日期:2017.3.17
Strained, captodative benzylidene-azetidinones are demonstrated to function as potent reaction partners in thermal [2+2] cycloaddition with nitro alkenes. The relief of strain during the cycloaddition could be leveraged to secure the kinetic and thermodynamic stability for the amino-nitro-cyclobutane ring. Accordingly, this mild and robust procedure can be used to simplify the synthesis of aza-spiro[3