The Mannich-type reaction with nitro paraffins was first investigated by Henry2 who established that N-hydroxymethylpiperidine condensed with nitromethane and nitroethane yielding, respectively, 2-nitro-1, 3-bis-(N-piperidyl)-propane and 2-nitro-2-methyl-l, 3-bis-(h'- piperidyl)-propane. A large number of paper^^-^ have since been published on this type of reaction, and recently Senkus' and Lambert6 have shown that nitro alcohols derivable ...
