Lithium Hydroxide → HCID 15678656, compound

HRID 1493502Notes

Reaction equation

HRID 1493502 reaction equation
C[O:2][C:3](=[O:32])[CH2:4][C:5]1[CH:10]=[C:9]([O:11][CH2:12][CH2:13][CH2:14][CH2:15][O:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[CH:8]=[CH:7][C:6]=1[NH:23][C:24]1[C:29]([Cl:30])=[CH:28][CH:27]=[CH:26][C:25]=1[Cl:31].[Li+].[OH-]>O1CCCC1>[Cl:30][C:29]1[CH:28]=[CH:27][CH:26]=[C:25]([Cl:31])[C:24]=1[NH:23][C:6]1[CH:7]=[CH:8][C:9]([O:11][CH2:12][CH2:13][CH2:14][CH2:15][O:16][C:17]2[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=2)=[CH:10][C:5]=1[CH2:4][C:3]([OH:32])=[O:2]

Participants

4

Reactant 2

HCID 3939Lithium HydroxideHCID 57055750HCID 57055750, compound

Product 1

HCID 15678656HCID 15678656, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A solution of the ester of Step A, above (2.0 g, 4.2 mmol) in tetrahydrofuran (100 mL) and 1N LiOH (12.7 mL) is stirred under nitrogen overnight. The solvent is removed and the residue slurried in water. The mixture is acidified using dilute HCl and extracted with ethyl acetate (2×500 mL). The combined organic phases are washed with brine and dried (MgSO4). Removal of the solvent affords a brown oil which crystallizes from acetonitrile (white solid, 0.620 g, approximately 90% pure by HPLC). This material is further purified by HPLC (Dynamax C18, 2"-column, acetonitrileammonium acetate buffer 3:2) to provide pure title compound (0.250 g, white solid, m.p. 128°-131° C., dec.).

Workup

  1. customThe solvent is removed
  2. extractionextracted with ethyl acetate (2×500 mL)
  3. washThe combined organic phases are washed with brine
  4. dry with materialdried (MgSO4)
  5. customRemoval of the solvent
  6. customaffords a brown oil which
  7. customcrystallizes from acetonitrile (white solid, 0.620 g, approximately 90% pure by HPLC)
  8. customThis material is further purified by HPLC (Dynamax C18, 2"-column, acetonitrileammonium acetate buffer 3:2)

Sources & evidence

ORD record
ord-42a8b50b9b8949ed9b500ee4ad6f1926
Source dataset
uspto-grants-1991_06
Patent number
US05021576

Reaction notes

Loading…