Ceric ammonium nitrate → HCID 57925889, compound

HRID 1013504Notes

Reaction equation

[CH:1]([P:4]([CH2:9][CH2:10][N:11](CC1C=CC(OC)=CC=1)[C:12](=[O:18])[O:13][C:14]([CH3:17])([CH3:16])[CH3:15])([CH:6]([CH3:8])[CH3:7])=[O:5])([CH3:3])[CH3:2].O=[N+]([O-])[O-].[O-][N+](=O)[O-].[O-][N+](=O)[O-].[O-][N+](=O)[O-].[O-][N+](=O)[O-].[O-][N+](=O)[O-].[Ce+4].[NH4+].[NH4+]>CC#N.O>[CH:1]([P:4]([CH2:9][CH2:10][NH:11][C:12](=[O:18])[O:13][C:14]([CH3:17])([CH3:15])[CH3:16])([CH:6]([CH3:7])[CH3:8])=[O:5])([CH3:3])[CH3:2]

Participants

Conditions

Temperature: 0 °C

Procedure

A solution of tert-butyl [2-(diisopropylphosphoryl)ethyl](4-methoxybenzyl)carbamate (1.06 g, 2.68 mmol) in MeCN (20 mL) was cooled to 0° C. CAN (4.40 g, 8.03 mmol) in water (10 mL) was added dropwise via addition funnel over 15 minutes, and the reaction was subsequently stirred at 0° C. for an additional 1 h. The solution was then diluted with water and extracted with EtOAc (4×). The combined organic layers were washed with 10% Na2SO3 (2×). The sodium sulfite layers were then back-extracted with additional EtOAc (2×). All of the organic extracts were combined, dried (MgSO4), and evaporated. Flash chromatography (0-10% MeOH/CH2Cl2) afforded tert-butyl [2-(diisopropylphosphoryl)ethyl]carbamate as a colorless solid. 1H NMR (CDCl3, 600 MHz) δ 5.59 (bs, 1H), 3.50-3.42 (dt, J=13.0, 6.5 Hz, 2H), 2.01-1.92 (m, 2H), 1.88-1.83 (m, 2H), 1.39 (s, 9H), 1.18 (dd, J=14.9, 7.2 Hz, 6H), 1.14 (dd, J=15.3, 7.2 Hz, 6H). MS: cal'd 278 (MH+), exp 278 (MH+).

Workup

extractionextracted with EtOAc (4×)
washThe combined organic layers were washed with 10% Na2SO3 (2×)
extractionThe sodium sulfite layers were then back-extracted with additional EtOAc (2×)
dry with materialdried (MgSO4)
customevaporated

Sources & evidence

ORD record: ord-eebfe84ae2944565bdbfd95e1ada3988
Source dataset: uspto-grants-2011_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07981874B2

Reaction notes

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