Scheme 2.
Synthesis of mixed aryl acyloxy phosphonate esters. Reagents and conditions: (a) ArOH, Et3N, 82% for 11, 35% for 13; (b) POMCl, NaI, reflux, 31% for 11, 28% for 13 ; (c) SeO2, tBuOOH, rt, 12% for 12, 9% for 14.
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