The reaction of boryllithium 2 with 1.0 or 0.5 equiv of MgBr2·OEt2 provided boryl Grignard reagents, borylmagnesium bromides 3 and 4, or bis(boryl)magnesium 5. Structures of 3, 4, and 5 in the crystal
Dithiocarbamate-substituted lactams, prepared through group-transfer cyclization reactions of carbamoyl radicals, undergo a Chugaev-like thermal elimination of the dithiocarbamate group in refluxing d
The Pictet–Spengler reaction between tryptamine and (5-methoxy-2-nitrophenyl)-glyoxal in hot AcOH could trigger a redox-mediated cyclization and reduction sequence to form iheyamine A in 52% yield.
