@article{oai:kumadai.repo.nii.ac.jp:00030978,
 author = {Sasaki, Jun-ichi and Kobayashi, Makoto and Ibe, Yusuke and Nishino, Hiroshi and 西野, 宏},
 issue = {2},
 journal = {Heterocycles},
 month = {Sep},
 note = {The Mn(III)-based oxidation of phenyl- and alkyl-substituted hydroxycyclobutenones selectively produced the bis(butenolide)s or the acetate monomers via the 5-endo radical cyclization depending upon the concentration of the reaction. A similar reaction of hydroxycyclobutenones bearing an alkenyl and alkynyl substituent did not produce any bis(butenolide)s or acetate monomers, but the 5-exo and 6-endo radical cyclization products including the unsaturated group. The oxidation of the hydroxycyclobutenones having an unsaturated substituent in the presence of alkenes afforded radical coupling products during the 5-exo radical cyclization. The reaction details, structure determination of the products, and the mechanism for the formation of the products are described.},
 pages = {958--988},
 title = {Mn(III)-BASED OXIDATIVE RADICAL RING-EXPANSION REACTION USING SQUARATE DERIVATIVES : SELECTIVE SYNTHESIS OF BIS(BUTENOLIDE)S AND THE ACETATE MONOMERS},
 volume = {99},
 year = {2019},
 yomi = {ニシノ, ヒロシ}
}