The reactions of S-alkylthioamidium iodides with some mercuric compounds have been studied. Mercuric carboxylates were found to react with S-alkylthioamidium iodides giving the corresponding acid anhydrides and amides in good yields along with alkylmercaptomercuric iodide. In addition, it was established that the reaction of mercuric cyanide with the iodides afforded α-dimethylaminomalononitriles by
1-Dimethylamino-1-methoxy-1-alkenes (ketene O,N-acetals), 1-dimethylamino-1-ethylthio-1-alkenes (keteneS,N-acetals) and 1,1-bis(dimethylamino)ethylene (ketene N,N-acetal) reacted with diethyl phosphite to give the corresponding (E)-diethyl 1-dimethylamino-1-alkenylphosphonates. Although ketene diethylacetal (ketene O,O-acetal) reacted with diethyl phosphite to give diethyl 1,1-diethoxy-1-ethylphosphonate
with some electrophilicreagents were investigated. One equivalent of phenyl isocyanate and two equivalents of diphenylketene reacted with the ketene-N, S-acetal to produce substituted acrylanilide and 2, 3-dihydro-α-pyrone derivative, respectively. On the other hand, the reactions of the ketene-N, S-acetal with carbon disulfide in the presence of elemental sulfur and with electrophilic oleflns, such