Reactions with sulfur dioxide and sulfinimines

Mikolajczuk and J. Drabowiez, Synthesis, 124 (1974) see also J. Drabowiez, S. Legedzand M. Mikolajczuk,/ Chem. Soc., Chem. Commun., 1670(1985). 

Coutrot, M. Yoursefi-Tabrizi and C. Grison,/ Organomet. Chem. 316,13 (1986). 

The reaction of organomagnesium compounds with sulfur dioxide provides a good general method for the preparation of magnesium sulfinates, and thence to various derived compounds (cf. reactions with carbon dioxide see Section 6.4)  

The following procedure [1] is typical, and other similar examples have been described [2] (see also General Ref. [A] for an account of earlier work). An alternative procedure is that described for organolithium compounds (see General Ref. [G], p. 142) [3], in which the Grignard reagent is added to a solution of liquid sulfur dioxide in ether at -78°. 

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