Highly regioselective hypervalent iodine mediated ring cleavage and ring expansion reactions of some pentacyclo[5.4.0.02,6.03,10.05,9]undecane derivatives

Syntheses and reactions of cage compound

Syntheses and reactions of cage compounds VI. Synthesis of pentacyclo[6,3,0,02,7,05,11,06,9]-undecanones and pentacyclo[6,4,0,02,7,03,10,06,9]dodecanediones by diazomethane ring expansion

✍ Ken-ichi Hirao; Etsuko Abe; Osamu Yonemitsu 📂 Article 📅 1975 🏛 Elsevier Science 🌐 French ⚖ 232 KB

Cm irradiation, cyclopentadiene dimer (3 and its enone derivatives (L,s$ are converted easily to the corresponding cage compounds, 5, 16\* 73and84 .." ,' u \_, by intramolecular cycloaddition, whereas the corresponding transformation of a six-membered analog, from cyclohexadiene dimer (9\_) to lO\_,