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