2-Isobutoxy-4,4,6-trimethyl-1,3,2-dioxaborinane reacts with bis(2-cyanoethy
l) ether and bis[2-(2-cyanoethoxy)ethyl] ether to afford the corresponding
bis(5,6-dihydro-4,4,6-trimethyl-1,3-4H-oxazin-2-y1) derivatives which are r
eadily hydrolyzed in aqueous alkali, yielding 4-amino-4-methyl-2-pentanol.