Butylamine → (2S,3R,4R,5S,6R)-6-(acetoxymethyl)-3-(3-butylthioureido)-tetrahydro-2H-pyran-2,4,5-triyl triacetate

HRID 2194654Notes

Reaction equation

HRID 2194654 reaction equation
[C:1]([O:4][C@H:5]1[C@H:10]([N:11]=[C:12]=[S:13])[C@@H:9]([O:14][C:15](=[O:17])[CH3:16])[C@H:8]([O:18][C:19](=[O:21])[CH3:20])[C@@H:7]([CH2:22][O:23][C:24](=[O:26])[CH3:25])[O:6]1)(=[O:3])[CH3:2].[CH2:27]([NH2:31])[CH2:28][CH2:29][CH3:30].C([O-])(O)=O.[Na+]>C(Cl)Cl>[C:1]([O:4][C@H:5]1[C@H:10]([NH:11][C:12]([NH:31][CH2:27][CH2:28][CH2:29][CH3:30])=[S:13])[C@@H:9]([O:14][C:15](=[O:17])[CH3:16])[C@H:8]([O:18][C:19](=[O:21])[CH3:20])[C@@H:7]([CH2:22][O:23][C:24](=[O:26])[CH3:25])[O:6]1)(=[O:3])[CH3:2]

Participants

5

Reactant 3

HCID 8007ButylamineHCID 516892Sodium BicarbonateHCID 14130735(2S,3R,4R,5S,6R)-6-(acetoxymethyl)-3-isothiocyanatotetrahydro-2H-pyran-2,4,5-triyl triacetate

Product 1

HCID 86638173(2S,3R,4R,5S,6R)-6-(acetoxymethyl)-3-(3-butylthioureido)-tetrahydro-2H-pyran-2,4,5-triyl triacetateYield 97.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a stirred solution of (2S,3R,4R,5S,6R)-6-(acetoxymethyl)-3-isothiocyanato-tetrahydro-2H-pyran-2,4,5-triyl triacetate (489 mg, 1.26 mmol) in CH2Cl2 (5 mL) was added neat butylamine (197 μL, 2.00 mmol) and the resulting mixture was stirred for 30 min. Saturated aqueous NaHCO3 (20 mL) was added, then the resulting mixture was extracted with CH2Cl2 (3×10 mL) and the combined organic extracts were dried (MgSO4) and concentrated. The resulting crude material was purified by flash chromatography on silica gel (hexane(EtOAc 1:1) to give (2S,3R,4R,5S,6R)-6-(acetoxymethyl)-3-(3-butylthioureido)tetrahydro-2H-pyran-2,4,5-triyl triacetate as a white foam (566 mg, 97% yield). 1H NMR (500 MHz, CDCl3) δ 0.94 (t, 3H, J=7.5 Hz), 1.35-1.41 (m, 2H, 1.53-1.59 (m, 2H), 2.06 (s, 3H), 2.08 (s, 3H), 2.10 (s, 3H), 2.14 (s, 3H), 3.38 (br s, 2H), 3.82-3.85 (m, 1H), 4.13-4.16 (m, 2H), 4.20-4.25 (m, 1H), 4.29 (dd, 1H, J=4.5, 12.5 Hz), 5.17-5.22 (m, 2H), 5.73 (d, 1H, J=8.0 Hz), 6.10 (br s, 1H).

Workup

  1. extractionthe resulting mixture was extracted with CH2Cl2 (3×10 mL)
  2. dry with materialthe combined organic extracts were dried (MgSO4)
  3. concentrationconcentrated
  4. customThe resulting crude material was purified by flash chromatography on silica gel (hexane(EtOAc 1:1)

Sources & evidence

ORD record
ord-9f62a459f3524d1fb75d9af12379d05e
Source dataset
uspto-grants-2012_12
Patent number
US08334310B2

Reaction notes

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