Abstract
AbstractThe reaction of 1‐cyanomethylpyridinium chloride or bromide,1a‐i, with 1,1‐bis(methylthio)‐2‐nitroethylene (2) in the presence of triethylamine as a base in ethanol gave the corresponding 2‐methylthioindolizine‐3‐carbonitrile3and 2‐methyl‐thio‐1‐nitroindolizine‐3‐carbonitrile4in good yields, respectively. Compounds3a,fwere key intermediates for the synthesis of cycl[3.2.2]azine derivatives.
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