1,6-Dioxo-2-azaspiro[3.4]oct-2-enes and Related Spirocycles: Heterocycles from [3 + 2] Nitrile Oxide Cycloadditions with 2-Methyleneoxetanes, -Thietanes, and -Azetidines
Jose Intano Jr., Louis P. Riel, Jacky Lim, Jerome R. Robinson, and Amy R. Howell*
J. Org. Chem. 2023, 88, 24, 16854–16863
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dx.doi.org/10.1021/acs.joc.3c01624