Asymmetric organocatalytic Strecker-type reactions of aliphatic N,N-dialkylhydrazones
作者:Aurora Martínez-Muñoz、David Monge、Eloísa Martín-Zamora、Eugenia Marqués-López、Eleuterio Álvarez、Rosario Fernández、José M. Lassaletta
DOI:10.1039/c3ob41437j
日期:——
The enantioselective organocatalytic Strecker-typereaction of aliphatic N,N-dialkylhydrazones is presented. Using trimethylsilyl cyanide (TMSCN) as the cyanide source, the reaction can be efficiently catalyzed by a tert-leucine-derived bifunctional thiourea to afford the corresponding hydrazino nitriles in good to excellent yields (50–96%) and moderate to good enantioselectivities, up to 86% ee. Further