[CH3:1][C:2]1([CH3:11])[O:6][C@@H:5]([CH:7]=O)[C:4]([CH3:10])([CH3:9])[O:3]1.[OH2:12].Cl.[NH2:14]O.C([O-])([O-])=O.[Na+].[Na+]>CO>[CH3:1][C:2]1([CH3:11])[O:6][C@@H:5]([CH:7]=[N:14][OH:12])[C:4]([CH3:10])([CH3:9])[O:3]1
(R)-2,2,5,5-Tetramethyl-1,3-dioxolane-4-carbaldehyde (16 g, 101 mmol) (Burger, A. Synthesis 1989, (2) 93-97) was dissolved in 1:1 methanol:water (250 mL), and hydroxylamine hydrochloride (7.0 g, 101 mmol) and Na2CO3 (5.4 g, 51 mmol) were added and the reaction was stirred at ambient temperature for 2 hours. The methanol was partially removed in vacuo and the aqueous layer was extracted with CH2Cl2, dried, filtered, and concentrated to afford (S)-2,2,5,5-tetramethyl-1,3-dioxolane-4-carbaldehyde oxime (13 g, 75 mmol, 74% yield) as an amber oil.
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