Sodium Carbonate → HCID 57792812, compound

HRID 333032Notes

Reaction equation

HRID 333032 reaction equation
C(=O)([O-])[O-].[Na+].[Na+].[CH:7]1[C:19]2[CH:18]([CH2:20][O:21][C:22](Cl)=[O:23])[C:17]3[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=3)[C:11]=2[CH:10]=[CH:9][CH:8]=1.[Cl:25][C@@H:26]1[CH2:30][NH:29][C@@H:28]2[C@@H:31]([OH:34])[CH2:32][O:33][C@H:27]12>O.O1CCOCC1>[Cl:25][C@@H:26]1[CH2:30][N:29]([C:22]([O:21][CH2:20][CH:18]2[C:19]3[CH:7]=[CH:8][CH:9]=[CH:10][C:11]=3[C:16]3[C:17]2=[CH:12][CH:13]=[CH:14][CH:15]=3)=[O:23])[C@@H:28]2[C@@H:31]([OH:34])[CH2:32][O:33][C@H:27]12

Participants

6

Reactant 3

HCID 10340Sodium CarbonateHCID 343679-Fluorenylmethyl chloroformateHCID 59807331HCID 59807331, compound

Product 1

HCID 57792812HCID 57792812, compoundYield 76%

Reagents, catalysts & solvents 2

HCID 962WaterSolvent2×HCID 312751,4-DioxaneSolvent2×

Procedure

A solution of sodium carbonate (155 mg, 1.46 mmol) in water (2.5 mL) then a solution of 9-fluorenylmethoxycarbonyl chloride (189 mg, 0.73 mmol) in 1,4-dioxane (1.5 mL) was added whilst stirring to a solution of aminoalcohol (77) in 1,4-dioxane (1 mL). The mixture was stirred for 65 minutes then water (20 mL) was added and the product extracted into dichloromethane (3×10 mL), then dried (Na2SO4), filtered and reduced in vacuo to leave a residue. Flash chromatography over silica, eluting with ethyl acetate:heptane mixtures 10:90 to 50:50 gave alcohol (78) (194 mg, 76%) as a white solid. TLC (Rf=0.45, EtOAc:heptane 1:1), analytical HPLC single main peak, Rt=15.51 min., HPLC-MS 386.1/388.1 [M+H]+, 408.1/410.1 [M+Na]+; [α]D23.0−7.46° (c=2.01, CHCl3); δH (500 MHz, CDCl3) mixture of rotamers 1:1; 1.15 (0.5H, s, OH), 3.05 (0.5H, t, J=9.58 Hz, FmocNCH2), 3.09 (0.5H, s, OH), 3.23 (0.5H, t, J=10.38 Hz, FmocNCH2), 3.43 (0.5H, d, J=4.37 Hz, FmocNCH), 3.53 (0.5H, brs, OCH2CHOH), 3.62 (0.5H, dd, J=10.20 and 1.92 Hz, OCH2CHOH), 3.75 (0.5H, dd, J=10.21 and 4.53 Hz, OCH2CHOH), 3.84-3.97 (2H, m, 1×FmocNCH2, 0.5×OCH2CHOH and 0.5×CHCl), 4.02 (0.5H, dd, J=9.96 and 4.65 Hz, OCH2CHOH), 4.06-4.12 (0.5H, m, CHCl), 4.15-4.26 (1.5H, m, Fmoc CH and 0.5×FmocNCH), 4.39-4.46 (1.5H, m, 0.5×OCH2CHOH, 0.5×Fmoc CH2 and 0.5×CHCHCl), 4.50 (0.5H, dd, J=10.64 and 6.70 Hz, Fmoc CH2), 4.67 (0.5H, t, J=4.29 Hz, CHCHCl), 4.75 (0.5H, dd, J=10.86 and 3.69 Hz, Fmoc CH2), 4.82 (0.5H, dd, J=10.82 and 3.97 Hz, Fmoc CH2), 7.30-7.81 (8H, aromatic CH); δC (125 MHz, CDCl3) 47.22/47.41 (Fmoc CH), 50.55/50.93 (FmocNCH2), 54.60/55.28 (CHCl), 65.94/67.60 (Fmoc CH2), 69.08/69.56 (FmocNCH), 75.00/75.35 (OCH2CHOH), 76.23/76.86 (OCH2CHOH), 81.27/81.84 (CHCHCl), 119.87/119.92/120.09/124.42/124.46/124.82/124.88/127.10/127.50/127.51/127.89/127.96/127.98/128.53 and 128.65 (aromatic CH), 141.24/141.36/141.44/143.44/143.57/143.83 and 143.84 (aromatic quaternary), 153.41/154.42 (Fmoc C═O).

Workup

  1. extractionthe product extracted into dichloromethane (3×10 mL)
  2. dry with materialdried (Na2SO4)
  3. filtrationfiltered
  4. customto leave a residue
  5. washFlash chromatography over silica, eluting with ethyl acetate

Sources & evidence

ORD record
ord-90c847019efb4c2d8986854a1f7f11e5
Source dataset
uspto-grants-2014_11
Patent number
US08877927B2

Reaction notes

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