S. Harusawa et al., [3,3]SIGMATROPIC RING EXPANSION OF CYCLIC THIONOCARBONATES .9. TOTAL SYNTHESIS OF (+ -)-YELLOW SCALE PHEROMONE VIA 10-MEMBERED THIOLCARBONATE/, Tetrahedron, 49(35), 1993, pp. 7657-7666
(+/-)-Yellow scale pheromone 1 has been synthesized via the route illu
strated in Scheme 1. The [3,3]sigmatropic ring expansion of 8-membered
thionocarbonate 4 exclusively produced the (Z)-10-membered thiolcarbo
nate 3, which was transformed via three steps to the intermediate 2 wi
th all the necessary carbon atoms for the pheromone. Reductive removal
of the SCO moiety in 2 followed by acetylation gave 1.