Synthesis of 2‐Amino Substituted Oxazoles from α‐Amino Ketones and Isothiocyanates
<i>via</i>
Sequential Addition and I
<sub>2</sub>
‐Mediated Desulfurative Cyclization
Oxazol‐2‐amines were synthesized by annulation of α‐amino ketones and isothiocyanates. This sequential synthetic process involves addition of α‐amino ketones to isothiocyanates and I2‐promoted desulfurative cyclization omitting isolation of the less stable thiourea intermediates. It is transition metal‐free and operationally simple, providing access to a variety of 2‐amino substituted oxazole derivatives
diverse oxazol-2-amine derivatives in one step via the electrochemical desulfurative cyclization of isothiocyanates and α-amino ketones. On the basis of the cycle of in situ generation of iodine/desulfurative cyclization/iodide anion regeneration, the reaction is performed under metal-free and external-oxidant-free electrolytic conditions to achieve the formation of intermolecular C–O and C–N bonds, providing