Benzyl chloroformate → HCID 59468962, compound

HRID 1690116Notes

Reaction equation

HRID 1690116 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH2:8][O:9][C:10]1[CH:15]=[CH:14][C:13]([C@@H:16]2[NH:20][C@H:19]([C:21]([O:23][CH3:24])=[O:22])[CH2:18][CH2:17]2)=[CH:12][CH:11]=1.C(N(C(C)C)CC)(C)C.Cl[C:35]([O:37][CH2:38][C:39]1[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=1)=[O:36]>C(Cl)Cl>[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH2:8][O:9][C:10]1[CH:15]=[CH:14][C:13]([C@@H:16]2[N:20]([C:35]([O:37][CH2:38][C:39]3[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=3)=[O:36])[C@H:19]([C:21]([O:23][CH3:24])=[O:22])[CH2:18][CH2:17]2)=[CH:12][CH:11]=1

Participants

5

Reactant 3

HCID 10387Benzyl chloroformateHCID 81531DiisopropylethylamineHCID 59164826HCID 59164826, compound

Product 1

HCID 59468962HCID 59468962, compoundYield 97%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of methyl (5R)-5-(4-{[(2-fluorophenyl)methyl]oxy}phenyl)-L-prolinate (D33, 2.5 g, 7.6 mmol), and diisopropylethyl amine (2 ml, 11.4 mmol) in dry DCM (25 ml) at 0° C. was added dropwise benzyl chloroformate (1.3 ml, 9.1 mmol) and the mixture was stirred for 1 h from 0° C. to r.t. The mixture was washed with a 20% solution of citric acid and after with brine. The organic layer was dried (Na2SO4), filtered and evaporated. The residue was purified by chromatography on silica gel using cyclohexane and ethyl acetate (85:15) to afford the title compound (3.4 g, 97%) as a white solid; Rt (HPLC) 6.56 min; 1H NMR (400 MHz, CDCl3) δ (ppm): 7.42-7.60 (m, 3H); 7.29-7.42 (m, 3H); 7.15-7.25 (m, 3H); 7.06-7.15 (m, 1H); 6.86-7.03 (m, 3H); 5.10 and 5.15 (s, s, 2H); 4.84-5.04 (m, 3H); 4.48 and 4.55 (m, m, 1H); 3.69 and 3.84 (s, s, 3H); 2.27-2.39 (m, 1H); 2.16-2.27 (m, 1H); 2.03-2.16 (m, 1H); 1.91-2.03 (m, 1H).

Workup

  1. washThe mixture was washed with a 20% solution of citric acid
  2. dry with materialThe organic layer was dried (Na2SO4)
  3. filtrationfiltered
  4. customevaporated
  5. customThe residue was purified by chromatography on silica gel

Sources & evidence

ORD record
ord-78e0e5092fa1490eab4e978a29527089
Source dataset
uspto-grants-2012_04
Patent number
US08153623B2

Reaction notes

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