Methyl ketone break-and-rebuild: a strategy for full α-heterofunctionalization of acetophenones
作者:Thanh Binh Nguyen、Pascal Retailleau
DOI:10.1039/c7gc02558k
日期:——
The Willgerodtreaction under iron-catalyzed aerobic conditions was found to be an excellent tool for full α-heterofunctionalization of acetophenones with sulfur and amines. Via this break-and rebuild strategy, a wide range of thioglyoxamides was synthesized in a four-component, highly atom-, step- and redox-economical manner with water as the only by-product.
Metal-Free Syntheses of α-Ketothioamide and α-Ketoamide Derivatives from Sulfoxonium Ylides
作者:Trayambek Nath Chaubey、Paran J. Borpatra、Ajay Sharma、Satyendra Kumar Pandey
DOI:10.1021/acs.orglett.2c03371
日期:2022.11.4
An efficient base, additive and metal-free synthetic methods for α-ketothioamide and α-ketoamide derivativesfrom readily available sulfoxonium ylides have been described. Sulfoxonium ylides with primary or secondary amines afforded α-ketothioamides in the presence of elemental sulfur, whereas α-ketoamides were produced when I2 and TBHP were present. The reaction proceeded well at room temperature
Asinger,F. et al., Justus Liebigs Annalen der Chemie, 1966, vol. 691, p. 92 - 108
作者:Asinger,F. et al.
DOI:——
日期:——
Bestmann, Hans Juergen; Schmid, Guenter; Sandmeier, Dieter, Chemische Berichte, 1985, vol. 118, # 4, p. 1709 - 1719
作者:Bestmann, Hans Juergen、Schmid, Guenter、Sandmeier, Dieter、Schade, Gerold、Oechsner, Helmut
DOI:——
日期:——
Generation of Carbamoyl- and Thiocarbamoyllithium Synthons Having a Hydrogen(s) or an Aryl Group on the Nitrogen and Their Trapping with Carbonyl Electrophiles
Dimetalated amides 1 (Y = O) were generated as the synthons of carbamoyllithiums 2 (Y = O) by the reaction of isocyanates with iBu2AlTenBu and a subsequent tellurium-lithium exchange reaction. A series of amide derivatives 3 (Y = O) were obtained by the trapping of dianion 1 with electrophiles. This transformation can be successfully applied to the generation and trapping of thiocarbamoyllithium synthons 1 (Y = S) as well as to the nucleophilic introduction of the parent carbamoyl moiety H2NC(O).