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Preparation of spirocyclic oxindoles by cyclisation of an oxime to a nitrone and dipolar cycloaddition

Beth L. Ritchie, Alexandra Longcake and Iain Coldham

Beilstein J. Org. Chem. 2025, 21, 1890–1896. https://doi.org/10.3762/bjoc.21.146

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Chemical structure C<sub>6</sub>H<sub>8</sub>O<sub>4</sub>

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Extracted from

Scheme 5

Chemical Information

Calculated using the Chemistry Development Kit 2.12

Property Name	Property Value
Molecular Formula	C₆H₈O₄
Molecular Weight	144.13 g/mol
Exact Mass	144.0423 Da
InChI	InChI=1S/C6H8O4/c1-9-5(7)3-4-6(8)10-2/h3-4H,1-2H3/b4-3+
InChIKey	LDCRTTXIJACKKU-ONEGZZNKSA-N
SMILES	COC(=O)/C=C/C(=O)OC
Number of Atoms	18
Number of H-Bond Acceptors	4
Number of H-Bond Donors	0
Atoms in the Largest π-System	8
XLogP	0.2

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