94011-49-1
diethyl 2-phenacylpropanedioate
+
86046-73-3
(1-cyclobutenyl)triphenylphosphonium perchlorate
→
~84%
118418-47-6
diethyl 4-phenylbicyclo[3.2.0]hept-4-ene-2,2-dicarboxylate