Water → HCID 69241992, compound

HRID 1394131Notes

Reaction equation

[C:1]([O:5][C:6]([N:8]1[CH2:12][C@H:11](OS(C)(=O)=O)[CH2:10][C@H:9]1[C:18]([N:20]1[CH2:24][CH2:23][S:22][CH2:21]1)=[O:19])=[O:7])([CH3:4])([CH3:3])[CH3:2].O.[CH3:26][N:27](C=O)C>[C-]#N.C([N+](CCCC)(CCCC)CCCC)CCC>[C:1]([O:5][C:6]([N:8]1[CH2:12][C@@H:11]([C:26]#[N:27])[CH2:10][C@H:9]1[C:18]([N:20]1[CH2:24][CH2:23][S:22][CH2:21]1)=[O:19])=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

Conditions

Temperature: 50 °C

Procedure

To a solution of Example 17B (16.55 g, 44 mmol) in dry DMF (100 mL) under nitrogen was added tetrabutylammonium cyanide (50 g, 200 mmol). The mixture was heated to 50° C. for 60 hours and then poured into cold water and extracted with ethyl acetate (3×250 mL). The combined organic layers were dried (magnesium sulfate) and concentrated under reduced pressure. The residue was purified by flash silica gel chromatography with 50% ethyl acetate/50% hexane to provide the titled compound (12 g). MS (ESI) m/e 312 (M+H)+, 310 (M−H)−; 1H NMR (400 MHz, CD3OD) δ ppm 1.44 (m, 9H) 2.10 (m, 1H) 2.79 (m, 1H) 3.05 (m, 1H) 3.17 (m, 1H) 3.33 (m, 1H) 3.57 (dd, 1H) 3.83 (m, 2H) 3.96 (m, 1H) 4.48 (m, 1H) 4.65 (m, 2H).

Workup

extractionextracted with ethyl acetate (3×250 mL)
dry with materialThe combined organic layers were dried (magnesium sulfate)
concentrationconcentrated under reduced pressure
customThe residue was purified by flash silica gel chromatography with 50% ethyl acetate/50% hexane

Sources & evidence

ORD record: ord-d386c51c6fa74d5ba0d4b64ee60d39e1
Source dataset: uspto-grants-2008_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07348346B2

Reaction notes

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