Figure 2 EC50 values of compounds with good antifunal activities against B. cinerea and R. solania
Conclusions
In summary, we have developed a transition-metal-, acid- and external-oxidant-free method for the synthesis of chalcogenosulfonates from readily available starting materials. Indoles and sulfinic acid sodium salts bearing different substitution patterns are involved in this transformation. The mild conditions and the tolerance to a wide variety of functional groups permit the derivatization of complex indoles. To our knowledge, this is the first example of the construction of sulfonotelluroates. The afforded chalcogenosulfonates showed promising practical applications in pesticide development.
Experimental