Glycolic Acid → (S,S)-1-{5-[4-(Benzothiazol-2-yloxy)-benzyl]-2,5-diaza-bicyclo[2.2.1]hept-2-yl}-2-hydroxy-ethanone

HRID 545604Notes

Reaction equation

HRID 545604 reaction equation
Cl.[C@H:2]12[CH2:8][C@H:5]([NH:6][CH2:7]1)[CH2:4][N:3]2[CH2:9][C:10]1[CH:25]=[CH:24][C:13]([O:14][C:15]2[S:16][C:17]3[CH:23]=[CH:22][CH:21]=[CH:20][C:18]=3[N:19]=2)=[CH:12][CH:11]=1.[C:26](O)(=[O:29])[CH2:27][OH:28].Cl.CN(C)CCCN=C=NCC.CCN(CC)CC>C(Cl)Cl>[S:16]1[C:17]2[CH:23]=[CH:22][CH:21]=[CH:20][C:18]=2[N:19]=[C:15]1[O:14][C:13]1[CH:12]=[CH:11][C:10]([CH2:9][N:3]2[CH2:4][C@@H:5]3[CH2:8][C@H:2]2[CH2:7][N:6]3[C:27](=[O:28])[CH2:26][OH:29])=[CH:25][CH:24]=1

Participants

6

Reactant 4

HCID 757Glycolic AcidHCID 8471TriethylamineHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 67207143(S,S)-2-[4-(2,5-diaza-bicyclo[2.2.1]hept-2-ylmethyl)-phenoxy]-benzothiazole hydrochloride

Product 1

HCID 67206856(S,S)-1-{5-[4-(Benzothiazol-2-yloxy)-benzyl]-2,5-diaza-bicyclo[2.2.1]hept-2-yl}-2-hydroxy-ethanoneYield 55.3%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a stirred suspension of (S,S)-2-[4-(2,5-diaza-bicyclo[2.2.1]hept-2-ylmethyl)-phenoxy]-benzothiazole hydrochloride (1.6 g, 3.9 mmol), glycolic acid (600 mg, 7.8 mmol), and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (1.5 g, 7.8 mmol) in CH2Cl2 (15 mL) was added Et3N (2.7 mL, 19.5 mmol). The resulting solution was then stirred at rt for 16 h. The resulting white suspension was partitioned between CH2Cl2 (600 mL) and satd. aq. NaHCO3 (100 mL). The organic layer was separated, dried (Na2SO4), filtered and concentrated. Purification by silica gel flash chromatography (0% to 5% CH3OH in CH2Cl2) afforded the title compound as a white solid (853 mg, 55%). MS (ESI): mass calcd. for C21H21N3O3S, 395.13; m/z found, 396.2 [M+H]+. 1H NMR (500 MHz, CDCl3, mixture of rotamers): 7.73 (d, J=8.5 Hz, 1H), 7.67 (d, J=8.0 Hz, 1H), 7.41 (m, 2H), 7.38 (m, 1H), 7.32 (br m, 2H), 7.28 (m, 1H), 4.83 (br m, 0.5H), 4.21 (br d, J=14.5 Hz, 0.5H), 4.10-3.99 (br m, 2H), 3.80 (br d, J=11.7 Hz, 0.5H), 3.76 (d, J=13.8 Hz, 2H), 3.61 (br s, 1H), 3.50 (br s, 0.5H), 3.48-3.45 (m, 0.5H), 3.42 (br s, 0.5H), 3.39-3.35 (m, 0.5H), 3.23 (dd, J=9.2, 2.3 Hz, 0.5H), 3.01 (dd, J=9.7, 2.1 Hz, 0.5H), 2.90 (dd, J=9.8, 2.2 Hz, 0.5H), 2.81-2.77 (m, 0.5H), 2.58 (dd, J=9.7, 1.2 Hz, 0.5H), 2.07-2.01 (m, 0.5H), 2.00-1.96 (m, 0.5H), 1.80 (d, J=9.8 Hz, 0.5H), 1.70 (d, J=10.0 Hz, 0.5H).

Workup

  1. customThe resulting white suspension was partitioned between CH2Cl2 (600 mL)
  2. customThe organic layer was separated
  3. dry with materialdried (Na2SO4)
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customPurification by silica gel flash chromatography (0% to 5% CH3OH in CH2Cl2)

Sources & evidence

ORD record
ord-df3402a4f4384325bea8104154304ef2
Source dataset
uspto-grants-2011_05
Patent number
US07935725B2

Reaction notes

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