Triethylamine → 1-Cyanomethyl-4-pentyl-pyrrolidine-2-carboxylic acid [2-methyl-1-(3,4,5-trihydroxy-6-methylsulfanyl-tetrahydro-pyran-2-yl)-propyl]-amide

HRID 854009Notes

Reaction equation

HRID 854009 reaction equation
[CH3:1][CH:2]([CH3:28])[CH:3]([NH:15][C:16]([CH:18]1[CH2:22][CH:21]([CH2:23][CH2:24][CH2:25][CH2:26][CH3:27])[CH2:20][NH:19]1)=[O:17])[CH:4]1[CH:9]([OH:10])[CH:8]([OH:11])[CH:7]([OH:12])[CH:6]([S:13][CH3:14])[O:5]1.[CH2:29]([N:31](CC)CC)[CH3:30].BrCC#N>C(#N)C>[CH3:1][CH:2]([CH3:28])[CH:3]([NH:15][C:16]([CH:18]1[CH2:22][CH:21]([CH2:23][CH2:24][CH2:25][CH2:26][CH3:27])[CH2:20][N:19]1[CH2:30][C:29]#[N:31])=[O:17])[CH:4]1[CH:9]([OH:10])[CH:8]([OH:11])[CH:7]([OH:12])[CH:6]([S:13][CH3:14])[O:5]1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 11534BromoacetonitrileHCID 780406994-Pentyl-pyrrolidine-2-carboxylic acid [2-methyl-1-(3,4,5-trihydroxy-6-methylsulfanyl-tetrahydro-pyran-2-yl)-propyl]-amide

Product 1

HCID 112364551-Cyanomethyl-4-pentyl-pyrrolidine-2-carboxylic acid [2-methyl-1-(3,4,5-trihydroxy-6-methylsulfanyl-tetrahydro-pyran-2-yl)-propyl]-amideYield 10%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A stirred solution of crude 4-pentyl-pyrrolidine-2-carboxylic acid [2-methyl-1-(3,4,5-trihydroxy-6-methylsulfanyl-tetrahydro-pyran-2-yl)-propyl]-amide (210 mg, 0.50 mmol, 1 equiv) and triethylamine (0.21 mL, 1.51 mmol, 3 equiv), in anhydrous acetonitrile (3 mL) was treated with bromoacetonitrile (42 μl, 0.60 mmol, 1.2 equiv), at rt and under nitrogen. The resulting reaction mixture was stirred at rt for 18 h, evaporated to dryness and purified by chromatography over silica gel, with an eluant of 2.5% methanol in dichloromethane. The desired fractions were pooled, evaporated to dryness, and lyophilized to furnish the title compound (11.2 mg, 10%) as a fluffy white powder: TLC Rf=0.2 (5% methanol in dichloromethane); 1H NMR (300 MHz, CD3OD) δ 5.44 (d, J=5.49, 1), 4.38-4.23 (m, 4), 2.29 (s, 3), 1.52 (m, 11), 1.16-1.09 (m, 12); MS (ESPOS): 458.5 [M+H]+, MS (ESNEG): 456.5 [M−H]−.

Workup

  1. customThe resulting reaction mixture
  2. customevaporated to dryness
  3. custompurified by chromatography over silica gel, with an eluant of 2.5% methanol in dichloromethane
  4. customevaporated to dryness

Sources & evidence

ORD record
ord-452a8f6f91c242f8b30c721394fd4822
Source dataset
uspto-grants-2007_08
Patent number
US07256177B2

Reaction notes

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