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4. Acid-Catalyzed Rearrangement of Aryl-Substituted Homobenzo-quinone Epoxides

Haruyasu Asahara, Emi Kubo, Kyoko Togaya, Takuya Koizumi, Eiko Mochizuki, Takumi Oshima,

Tetrahedron Letters, 2007, 9, 3421–3424. (DOI: 10.1021/ol7014576)

3. Conformational Analysis in the Reversible Intramolecular [2+2] Photocycloaddition of Diphenylbicyclo[4.2.0]oct-3-ene-2,5-diones

Haruyasu Asahara, Eiko Mochizuki, Takumi Oshima,

Tetrahedron Letters, 2006, 47, 7881–7884. (DOI: 10.1016/j.tetlet.2006.09.013)

2. Two Conformers of 10,11-Dihydro-5H-dibenzo[a,d]cycloheptene Spiro-Linked with Homobenzoquinone Epoxide

Haruyasu Asahara, Takuya Koizumi, Eiko Mochizuki, Takumi Oshima,

Acta Crystallographica Section C, 2006, C62, o136–o138. (DOI: 10.1107/S0108270106002800)

1. Acid-Catalyzed Transannular Cyclization of 3aH-Cyclopentene[8]annulene-1,4-(5H,9aH)-diones and Some Proposed Mechanisms

Takuya Koizumi, Kenji Harada, Haruyasu Asahara, Eiko Mochizuki, Ken Kokubo, Takumi Oshima,

The Journal of Organic Chemistry, 2005, 70, 8364–8371. (DOI: 10.1021/jo050992x)