Mm. Mojtahedi et al., Ultrasound accelerated reductive coupling of imine or iminium ion generated in 5 m lithium perchlorate solution by lithium metal, SYN COMMUN, 31(23), 2001, pp. 3587-3592
A novel one-pot reductive coupling of imine or iminium ion generated in the
concentrated ethereal lithium perchlorate solution was achieved in the pre
sence of lithium metal. The yield of the reaction depends on the reactivity
preformed imine or iminium ion. Diamines were formed with high diastereose
lectivity in some cases in about 5 h. The reaction time was doubled without
the use of ultrasound acceleration.