Novel analogues of the title compound were prepared in several steps:
via addition of methylmagnesium iodide to an acetamide derivative to y
ield diastereomeric amino alcohols, followed by hydrolysis, cyclizatio
n to the corresponding oxazole or thiazole derivative, and a coupling
reaction with isocyanates. Results from acaricidal tests showed the co
mpounds to be 100 times less active than hexythiazox.