A new “one pot” preparation of 2-n,n-dialkylamino-1,3-benzoxazines and naphth[ 1,2-e][ 1,3]oxazines from corresponding ortho hydroxynitriles and phosgeniminium salts
A new “one pot” preparation of 2-n,n-dialkylamino-1,3-benzoxazines and naphth[ 1,2-e][ 1,3]oxazines from corresponding ortho hydroxynitriles and phosgeniminium salts