7713-76-0Relevant articles and documents
One-pot sequential 1,2-addition, Pd-catalysed cross-coupling of organolithium reagents with Weinreb amides
Giannerini,Vila,Hornillos,Feringa
supporting information, p. 1206 - 1209 (2016/01/15)
An efficient sequential 1,2-addition/cross-coupling of Weinreb amides with two organolithium reagents is reported. This synthetic approach allows access to a wide variety of functionalized ketones in a modular way. The one-pot procedure presented here takes advantage of a kinetically stable tetrahedral Weinreb intermediate during subsequent Pd-catalyzed cross-coupling with the second organolithium reagent leading, within short reaction times and under mild conditions, to the formation of ketones in excellent overall yields.
Process development and pilot-scale synthesis of new cyclization conditions of substituted phenylacetamides to tetrahydroisoquinoline-2-ones using Eaton's reagent
Ulysse, Luckner G.,Yang, Qiang,McLaws, Mark D.,Keefe, Daniel K.,Guzzo, Peter R.,Haney, Brian P.
experimental part, p. 225 - 228 (2010/04/29)
Tetrahydroisoquinoline is a ubiquitous structural framework presented in numerous pharmacologically relevant molecules. Although accessible by the Pictet-Spengler cyclization, conditions commonly used for such cyclizations are often difficult to implement on scale. Herein, we report the development of a scaleable approach utilizing Eaton's reagent for the cyclization of substituted phenylacetamide analogues to tetrahydroisoquinoline-2-one. The development, optimization, and safety hazard evaluations, which outline the benefits and ease of workup of this new process, are discussed.