Triacetoxyperiodinane → tert-butyl N-((2S)-1-oxopropan-2-yl)carbamate

(S)-(−)-2-(tert-Butoxycarbonylamino)-1-propanol (523 mg, 2.98 mmol, 1.0 equiv.) was dissolved in 45 mL methylene chloride in a 100 mL r.b. flask with a magnetic stir bar. To this clear homogeneous solution, Dess-Martin periodinane (1.523 g, 3.591 mmol, 1.2 equiv.) was added in one portion and the cloudy white reaction mixture was allowed to stir at room temperature for 2 h. Thin-layer chromotography monitored the reaction to completion. The reaction mixture was diluted with 100 mL ethyl acetate. Sodium bisulfite solution (2 M, 20 mL) was added to the reaction mixture and the organic layer was separated. The aqueous layer was washed with 3×30 mL EtOAc. The combined organic layers were washed with 50 mL 1 M NaOH, followed by saturated NaCl (30 mL) and dried over MgSO4. Filtration and rotary evaporation produced the desired product as a yellow oil (475 mg, 92% yield, Rf=0.63, 1:1 hexanes/ethyl acetate).

1. customthe reaction to completion
2. customthe organic layer was separated
3. washThe aqueous layer was washed with 3×30 mL EtOAc
4. washThe combined organic layers were washed with 50 mL 1 M NaOH
5. dry with materialdried over MgSO4
6. filtrationFiltration and rotary evaporation

ORDレコード

ord-67c33d6d82b64bfcb3f55c9b1f0b48d6

出典データセット

uspto-grants-2010_06

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US07732449B2