4-Nitrophenyl 1,3-thiazol-5-ylmethyl carbonate → Thiazol-5-ylmethyl ((1S,2S,4S)-1-benzyl-4-(((1,1-dimethylethoxy)carbonyl)amino)-2-hydroxy-5-phenylpentyl)carbamate

HRID 1419329Notes

Reaction equation

HRID 1419329 reaction equation
[NH2:1][C@H:2]([C@@H:10]([OH:28])[CH2:11][C@@H:12]([NH:20][C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:13][C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)[CH2:3][C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1.[N+](C1C=CC([O:38][C:39]([O:41][CH2:42][C:43]2[S:47][CH:46]=[N:45][CH:44]=2)=O)=CC=1)([O-])=O>CN(C=O)C>[C:24]([O:23][C:21]([NH:20][C@@H:12]([CH2:13][C:14]1[CH:15]=[CH:16][CH:17]=[CH:18][CH:19]=1)[CH2:11][C@H:10]([OH:28])[C@@H:2]([NH:1][C:39]([O:41][CH2:42][C:43]1[S:47][CH:46]=[N:45][CH:44]=1)=[O:38])[CH2:3][C:4]1[CH:5]=[CH:6][CH:7]=[CH:8][CH:9]=1)=[O:22])([CH3:25])([CH3:27])[CH3:26]

Participants

4

Reactant 2

HCID 98821474-Nitrophenyl 1,3-thiazol-5-ylmethyl carbonateHCID 119979265-tert-Butyloxycarbonylamino-2-amino-3-hydroxy-1,6-diphenylhexane, (2S,3S,5S)-

Product 1

HCID 22858342Thiazol-5-ylmethyl ((1S,2S,4S)-1-benzyl-4-(((1,1-dimethylethoxy)carbonyl)amino)-2-hydroxy-5-phenylpentyl)carbamateYield 80%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

The product of Example 68D (6.0 g , 15.6 mmoles) was dissolved in 60 mL of DMF under nitrogen atmosphere. To this stirred solution at room temperature was added 5-(p-nitrophenyloxycarbonyloxymethyl)thiazole (4.67 g 15.6 mmole) and the resulting solution was stirred for 4h. The solvent was removed under reduced pressure by rotary evaporation and the residue dissolved in 150 mL EtOAc. This solution was washed with 5×75 mL 1N NaOH solution, 100 mL brine, dried over Na2SO4. The solvent was removed to afford 8.02 g of a slightly yellowish oil. This material was crystallized from 30 mL EtOAc and 40 mL hexane to afford 6.53 g (80%) of the desired product as a white solid. mp 118°-120° C. H 1NMR (CDCl3) δ 8.79 (s, 1H), 7.83 (s, 1H), 7.30-7.15 (m, 8H), 7.08 (m, 2H), 5.23 (s, 2H), 5.14 (d, 1H, J=9 Hz), 4.52 (m, 1H), 3.92-3.72 (m, 3H), 3.65 (m, 1H), 2.85 (d-apparent, 2H, J=7.5 Hz), 2.72 (d-apparent, 2H, J=7 Hz), 1.61 (m, 2H), 1.38 (s, 9H). CIMS m/z (526) (M+H)+, 543 (M+18)+.

Workup

  1. customThe solvent was removed under reduced pressure by rotary evaporation
  2. dissolutionthe residue dissolved in 150 mL EtOAc
  3. washThis solution was washed with 5×75 mL 1N NaOH solution, 100 mL brine
  4. dry with materialdried over Na2SO4
  5. customThe solvent was removed
  6. customto afford 8.02 g of a slightly yellowish oil
  7. customThis material was crystallized from 30 mL EtOAc and 40 mL hexane

Sources & evidence

ORD record
ord-f64701786a7747869fba72ad5923e913
Source dataset
uspto-grants-1999_03
Patent number
US05886036

Reaction notes

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