Sodium Cyanide → HCID 67640328, compound

HRID 399515Notes

Reaction equation

HRID 399515 reaction equation
[C:1]([O:5][C:6](=[O:24])[C@@H:7]1[CH2:11][C@@H:10](OS(C)(=O)=O)[CH2:9][N:8]1[C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])([CH3:4])([CH3:3])[CH3:2].[C-:25]#[N:26].[Na+]>CN(C)C=O.C(OCC)(=O)C>[C:1]([O:5][C:6](=[O:24])[C@@H:7]1[CH2:11][C@H:10]([C:25]#[N:26])[CH2:9][N:8]1[C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])([CH3:4])([CH3:3])[CH3:2]

Participants

5

Reactant 2

HCID 8929Sodium CyanideHCID 10861453HCID 10861453, compound

Product 1

HCID 67640328HCID 67640328, compound

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
80 °C

Procedure

A mixture of (4R)-1-(tert-butyloxycarbonyl)-4-(methane-sulfonyloxy)-L-proline tert-butyl ester (680 mg, 1.86 mmol) and sodium cyanide (912 mg, 18.6 mmol) in N,N-dimethylformamide (14 mL) was stirred for 16 hours at 80° C. under a nitrogen atmosphere. The cooled reaction mixture was diluted with ethyl acetate (100 mL), washed with water (2×), saturated brine solution, dried (Na2SO4), and evaporated. The crude product mixture was subjected to flash silica gel chromatography eluting with 20% ethyl acetate/hexane. Fractions containing the TLC less-mobile isomer were combined and evaporated to afford the desired title compound; yield 275 mg (50%). 400 MHz 1H NMR (CDCl3): δ1.42-1.48 (4s, 18H); 2.24 (m, 1H); 2.67 (m, 1H); 3.08 (m, 1H); 3.64 (m, 1H); 3.81-3.96 (m, 1H); 4.17-4.28 (m, 1H).

Workup

  1. customThe cooled reaction mixture
  2. washwashed with water (2×), saturated brine solution
  3. dry with materialdried (Na2SO4)
  4. customevaporated
  5. washeluting with 20% ethyl acetate/hexane
  6. additionFractions containing the TLC less-mobile isomer
  7. customevaporated

Sources & evidence

ORD record
ord-a3540fd27a934222ac2ca433182d46fe
Source dataset
uspto-grants-1998_10
Patent number
US05821261

Reaction notes

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