@article{oai:kumadai.repo.nii.ac.jp:00030975,
 author = {Nishino, Hiroshi and 西野, 宏 and HUYNH, Thanh-Truc and Nguyen, Van-Ha and Nishino, Hiroshi},
 issue = {37},
 journal = {Tetrahedron Letters},
 month = {Sep},
 note = {application/pdf, application/pdf, application/pdf, 論文, 2-Oxa-7-azaspiro[4.4]nonane-8,9-diones were newly synthesized in good yields by the Mn(III)-based reaction of a mixture of 1,1-diarylethenes and 4-acylpyrrolidine-2,3-diones. Under the stated reaction
conditions, the pyrrolidinedione ring remained intact and became one of the two rings of the 2-oxa-7-azaspiro[4.4]nonanedione scaffold. The procedure was simple and the product was easily separated.
The structure determination and the mechanism for the formation of the 2-oxa-7-azaspiro[4.4]nonanediones were also discussed., https://www.sciencedirect.com/science/article/pii/S0040403917309784?via%3Dihub},
 pages = {3619--3622},
 title = {One-pot synthesis of 2-oxa-7-azaspiro[4.4]nonane-8,9-diones using Mn(III)-based oxidation of 4-acylpyrrolidine-2,3-diones},
 volume = {58},
 year = {2017},
 yomi = {ニシノ, ヒロシ}
}