Diisopropylethylamine → (S)[1-{(2-tert-Butoxycarbonylamino-ethyl)-[(2-methyl-2-phenyl-propylcarbamoyl)-methyl]-carbamoyl}-2-(1-trityl-1H-imidazol-4-yl)-ethyl]-carbamic acid benzyl ester

HRID 841144Notes

Reaction equation

HRID 841144 reaction equation
[CH2:1]([O:8][C:9]([NH:11][C@@H:12]([CH2:30][C:31]1[N:32]=[CH:33][N:34]([C:36]([C:49]2[CH:54]=[CH:53][CH:52]=[CH:51][CH:50]=2)([C:43]2[CH:48]=[CH:47][CH:46]=[CH:45][CH:44]=2)[C:37]2[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=2)[CH:35]=1)[C:13]([N:15]([CH2:26][C:27](O)=[O:28])[CH2:16][CH2:17][NH:18][C:19]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[O:20])=[O:14])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Cl.[CH3:56][C:57]([CH3:66])([C:60]1[CH:65]=[CH:64][CH:63]=[CH:62][CH:61]=1)[CH2:58][NH2:59].C(N(C(C)C)CC)(C)C.C1CN([P+](ON2N=NC3C=CC=CC2=3)(N2CCCC2)N2CCCC2)CC1.F[P-](F)(F)(F)(F)F>C(Cl)Cl>[CH2:1]([O:8][C:9](=[O:10])[NH:11][C@H:12]([C:13](=[O:14])[N:15]([CH2:16][CH2:17][NH:18][C:19]([O:21][C:22]([CH3:23])([CH3:24])[CH3:25])=[O:20])[CH2:26][C:27](=[O:28])[NH:59][CH2:58][C:57]([CH3:66])([C:60]1[CH:65]=[CH:64][CH:63]=[CH:62][CH:61]=1)[CH3:56])[CH2:30][C:31]1[N:32]=[CH:33][N:34]([C:36]([C:37]2[CH:38]=[CH:39][CH:40]=[CH:41][CH:42]=2)([C:43]2[CH:44]=[CH:45][CH:46]=[CH:47][CH:48]=2)[C:49]2[CH:54]=[CH:53][CH:52]=[CH:51][CH:50]=2)[CH:35]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 210601Phenethylamine, beta,beta-dimethyl-, hydrochlorideHCID 2724699PyBOPHCID 18717554(S)[[2-Benzyloxycarbonylamino-3-(1-trityl-1H-imidazol-4-yl)-propionyl]-(2-tert-butoxycarbonylamino-ethyl)-amino]-acetic acid

Product 1

HCID 70169971(S)[1-{(2-tert-Butoxycarbonylamino-ethyl)-[(2-methyl-2-phenyl-propylcarbamoyl)-methyl]-carbamoyl}-2-(1-trityl-1H-imidazol-4-yl)-ethyl]-carbamic acid benzyl esterYield 70%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

The compound from Step 3 (1.3 g, 1.8 mmol) was dissolved in methylene chloride (10 mL). β,β-dimethylphenethylamine hydrochloride (Example 1, Step 6) (0.370 g, 2 mmol) was added followed by diisopropylethylamine (1 mL, 5.7 mmol) and PyBOP (1.04 g, 2 mmol) dissolved in methylene chloride (10 mL). The reaction was stirred overnight at room temperature. The solution was concentrated, the residue taken up in ethyl acetate and washed three times with saturated NaHCO3, brine, dried over MgSO4, filtered and concentrated to give a white solid; 1.09 g (70% yield). MS-APCI: M+1=863.

Workup

  1. concentrationThe solution was concentrated
  2. washwashed three times with saturated NaHCO3, brine
  3. dry with materialdried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customto give a white solid

Sources & evidence

ORD record
ord-c246135d11f942a89c483a139b50f77d
Source dataset
uspto-grants-2002_04
Patent number
US06369034B1

Reaction notes

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