Synthesis of tetrahydro-1,3-oxazin-2-ones and-2-thiones from esters of N-(3-oxoalkyl)carbamic and -dithiocarbamic acids
A study, has been made of the interaction of N-(3-oxoalk),l)carbamates and -dithiocarbamates with sodium borohydride; it has been shown that, depending on the pH of the reaction medium, the interaction may produce either tetrahydro-1,3-oxazin-2-ones and -2-thiones, or N-(3-hydroxyalkyl)carbanartes and -dithiocarbamates.