Ds. Reddy et al., UNEXPECTED FORMATION OF CYCLIC HYDROXAMIC ACIDS FROM O-(2-AMINOBENZOYL) HYDROXYLAMINE, Synthetic communications, 26(15), 1996, pp. 2843-2846
Cyclic hydroxamic acids 3 and 4 are the unexpected products in the rea
ction of 0-(2-aminobenzoyl) hydroxylamine 1 and orthoesters, acid chlo
rides, ethyl chloroformate.