Carbonyl oxide chemistry. Part 3. Regioselectivity of the first [3 + 2] cycloaddition of carbonyl oxides to phenyl isocyanate: one-pot synthesis of 1,2,4-dioxazolidin-3-ones

Abstract

Carbonyl oxides 3 react with phenyl Isocyanate to give the 1, 2, 4-dioxazolidin-3-ones 4, providing a potentially useful synthesis of a heterocyclic system which is structurally related to several biologically active products. The crystal structure of the dioxazolidinone 4a is also reported.