Di-2-pyridyl sulfite

Di-2-pyridyl sulfite 1660 is presented as a useful reagent for the preparation of isocyanides under mild conditions [1230], Yields given in the table therein are good (70-82% for test alkyl, benzylic, and aryl isocyanides). The reagent (prepared from 2-hydroxypyridine 1659 and thionyl chloride) is rather unstable, but can be stored in a refrigerator for a week without decomposition , according to the authors. 

---