Triethylamine → HCID 86641981, compound

HRID 1092581Notes

Reaction equation

HRID 1092581 reaction equation
Cl.[NH2:2][C@@H:3]([CH2:11][CH:12]([CH3:14])[CH3:13])[C:4]([O:6][C:7]([CH3:10])([CH3:9])[CH3:8])=[O:5].C(N(CC)CC)C.[CH3:22][S:23](Cl)(=[O:25])=[O:24]>ClCCl>[CH3:13][CH:12]([CH3:14])[CH2:11][C@H:3]([NH:2][S:23]([CH3:22])(=[O:25])=[O:24])[C:4]([O:6][C:7]([CH3:8])([CH3:9])[CH3:10])=[O:5]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 31297Methanesulfonyl chlorideHCID 12451443tert-butyl (2S)-2-amino-4-methylpentanoate hydrochloride

Product 1

HCID 86641981HCID 86641981, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

(S)-tert-Butyl 2-amino-4-methylpentanoate hydrochloride (1.53 g, 6.84 mmol) was dissolved in dichloromethane and triethylamine (3.15 mL, 22.57 mmol). Methanesulfonyl chloride (0.638 mL, 8.21 mmol) was added dropwise, and the reaction stirred at room temperature for 1 hour. The reaction was quenched with saturated aqueous NaHCO3 and extracted with dichloromethane (3×50 mL). The solvent was removed in vacuo to give (S)-tert-butyl 4-methyl-2-(methylsulfonamido)pentanoate: 1H NMR (300 MHz, CDCl3) δ ppm 4.71 (d, J=9.7, 1H), 3.98 (td, J=9.5, 5.5, 1H), 2.92 (s, 3H), 1.84 (dt, J=13.1, 6.6, 1H), 1.54 (s, 9H), 1.44-1.48 br s, 1H), 0.96 (dd, J=6.6, 2.4, 6H); MS (ESI−) m/z 264 (M−H)−. (S)-tert-Butyl 4-methyl-2-(methylsulfonamido)pentanoate was dissolved in 10 mL of 4 N HCl in dioxane and stirred at room temperature overnight. The solvent was removed under a stream of nitrogen and under high vacuum to give (S)-4-methyl-2-(methylsulfonamido)pentanoic acid: 1H NMR (300 MHz, CDCl3) δ ppm 4.86 (d, J=9.6, 1H), 4.17 (td, J=9.6, 4.8, 1H), 3.18-3.07 (m, 1H), 2.99 (s, 3H), 1.96-1.80 (m, 1H), 1.64 (dddd, J=23.4, 13.9, 9.1, 5.0, 2H), 1.40 (t, J=7.3, 1H), 0.98 (dd, J=6.6, 3.3, 6H).

Workup

  1. customThe reaction was quenched with saturated aqueous NaHCO3
  2. extractionextracted with dichloromethane (3×50 mL)
  3. customThe solvent was removed in vacuo

Sources & evidence

ORD record
ord-9bcf52a9e9b543dfaf6b10a27da87948
Source dataset
uspto-grants-2012_03
Patent number
US08129417B2

Reaction notes

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