2,3-Butanedione bis[O-(butylsulfonyl)oxime]
[CAS 357164-86-4]

Identification

• Classification: Chemical reagent >> Organic reagent >> Oxime
• Name: 2,3-Butanedione bis[O-(butylsulfonyl)oxime]
• Synonyms: [(Z)-[(3E)-3-butylsulfonyloxyiminobutan-2-ylidene]amino] butane-1-sulfonate
• Molecular Formula: C₁₂H₂₄N₂O₆S₂
• Molecular Weight: 356.46
• CAS Registry Number: 357164-86-4
• SMILES: CCCCS(=O)(=O)O/N=C(C)/C(=NOS(=O)(=O)CCCC)/C

chemBlink Chemical Story

The words bis[O-(butylsulfonyl)oxime] describe a substantial change to the chemistry of a familiar dicarbonyl framework. In 2,3-butanedione, the two central carbons carry carbonyl groups. In the compound registered as CAS 357164-86-4, the corresponding sites are represented as oxime-derived C=N-O-SO₂-butyl groups. It is therefore an O-sulfonylated dioxime derivative, not the original diketone and not an unchanged oxime with two free N-OH groups.

An official Japanese Ministry of Health, Labour and Welfare record links this CAS number to N²,N³-bis[(butane-1-sulfonyl)oxy]butane-2,3-diimine. That systematic description helps resolve two points in the shorter product name: both imine nitrogens carry an oxygen-containing substituent, and the sulfonyl substituent is derived from butane-1-sulfonic acid. It should not be confused with a tert-butylsulfonyl protecting group or with a simple sulfone attached directly to the carbon skeleton.

The distinction from a free oxime is chemically meaningful. Substitution at oxygen removes the oxime hydroxyl hydrogen and creates an N-O-sulfonyl linkage. Oxime derivatives of different types can have very different reaction pathways, so neither the uses of the parent diketone nor those of another oxime may be transferred automatically to this substance. The presence of two such sites is also a structural fact, not a measurement of how efficiently either site reacts.

The reviewed official source establishes a named substance and registry association, but does not supply a photochemical mechanism, quantum yield or validated processing window. Commercial categorization among photoacid-related materials is not a substitute for those measurements. No exact exposure wavelength, cure efficiency or discovery history is assigned here. The supported chemical account focuses on its verified functional-group identity; a fuller application story requires an original preparation or performance report tied unambiguously to this CAS and any relevant geometrical-isomer composition.

References:
1. Japan Ministry of Health, Labour and Welfare. Published chemical-substance record No.124301: N2,N3-bis[(butane-1-sulfonyl)oxy]butane-2,3-diimine; CAS 357164-86-4. Announcement 2021-09-27. https://anzeninfo.mhlw.go.jp/kag_det/kag_124301.html