Formation of 1,2-oxathietanes and their formal [σ2s + σ2a]cycloreversion during the stereoelectronically controlled aqueous decomposition of sulfoxide-substituted nitrosoureas
Formation of novel 1,2-oxathietanes from 2-chloroethyl sulfoxide precursors and their reactions in solution, including formal [.sigma.2s + .sigma.2a] cycloreversions and rearrangements