Pheromone synthesis. CLII: Synthesis of blattellastanosides A and B, chlorinated steroid glucosides isolated as the aggregation pheromone of the German cockroach, Blattella germanica L.
β-Sitosterol (3) was converted to blattellastanosides A (1, 6α-chloro-4β,5-epoxy-5β-stigmastan-3β-yl β-D-glucopyranoside) and B (2, 6α-chloro-5-hydroxy-5β-stigmastan-3β-yl β-D-glucopyranoside), the arrestant components of the aggregation pheromone of the German cockroach, Blattella germanica L.