The 2-(2-Azidoethyl)cycloalkanone Strategy for Bridged Amides and Medium-Sized Cyclic Amine Derivatives in the Aubé-Schmidt Reaction
作者:John Murphy、Fraser Macleod、Stuart Lang
DOI:10.1055/s-0029-1219340
日期:2010.3
2-(2-Azidoethyl)cycloalkanones afford bridged lactams in the Aube-Schmidt reaction, sometimes in excellent yield, and solvolysis yields derivatives of medium-ring amines. Attempts to divert the Schmidt reaction with an arene-mediated fragmentation of the normal Schmidt intermediate have led to an initial example.
development of expeditious methods to synthesize these skeletons remains a challenging task. In this work, the catalyticcyclization of biomass-derived 2-furylcarbinols with an azide to form fused triazoles is described. This approach takes advantage of a single catalyst Yb(OTf)3 and operates via a furfuryl-cation-induced intramolecular [3 + 2] cycloaddition/furan ring-opening cascade.
A process for producing a calcium carboxylate comprising contacting a nitrile compound, a calcium compound selected from calcium hydroxide, calcium oxide or mixtures thereof, and water at a temperature of about 90°C to about 250°C at a sufficient pressure and for a sufficient time to produce a reaction mixture comprising calcium carboxylate.
A process for producing a calcium carboxylate comprising contacting a nitrile compound, a calcium compound selected from calcium hydroxide, calcium oxide or mixtures thereof, and water at a temperature of about 90° C. to about 250° C. at a sufficient pressure and for a sufficient time to produce a reaction mixture comprising calcium carboxylate.
Synthesis of Bicyclic Isothiazoles through an Intramolecular Rhodium-Catalyzed Transannulation of Cyanothiadiazoles
作者:Boram Seo、Hyunseok Kim、Ya Gob Kim、Yonghyeon Baek、Kyusik Um、Phil Ho Lee
DOI:10.1021/acs.joc.7b02077
日期:2017.10.6
available cyanothiadiazoles containing an ester, amide, or ether as a linker is described. It provides a wide range of bicyclic isothiazoles in good to excellent yields together with the release of molecular nitrogen. These results indicate that the carbon atom in the α-thiavinyl carbene is nucleophilic and that the sulfur atom is electrophilic.