Elemental tellurium can be reduced by rongalite (HOCH2SO2Na . 2H(2)O)-
KOH in the solid phase by application of ultrasound or by microwave ir
radiation. Without solvent, the organic substrate (eg sulfonate ester
of an oxiranemethanol) is added with further sonication or irradiation
to yield the desired organic product (eg allylic alcohols) and elemen
tal Te which may be recycled. Phase-transfer conditions (water-toluene
) also ate satisfactory. (C) 1997 Elsevier Science Ltd.