STRUCTURE OF AROYL ISOCYANIDE TRIMERS
J . Org. Chem., Vol. $7, No. 16, 1972 2583
centration of this solution left an orange-colored oil, 258 mg (74%), a portion of which was injected into the gas chromatograph (240°, UCW-98 column). The ratio of l l a to l l b varied among several such alkylations from 75-95y0 l l a to 5-25% l l b depending upon the amount of butyllithium and the care exercized in the work-up to exclude moisture. Since the products were very sensitive to base, equilibration conditions were difficult to circumvent. The highest proportion (
