Diisopropylethylamine → N~2~-1,3-Benzoxazol-2-YL-3-cyclohexyl-N-{2-[(4-methoxyphenyl)amino]ethyl}-L-alaninamide

HRID 347273Notes

Reaction equation

HRID 347273 reaction equation
[O:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[NH:10][C@@H:11]([CH2:15][CH:16]1[CH2:21][CH2:20][CH2:19][CH2:18][CH2:17]1)[C:12]([OH:14])=O.[CH3:22][O:23][C:24]1[CH:29]=[CH:28][C:27]([NH:30][CH2:31][CH2:32][NH2:33])=[CH:26][CH:25]=1.CCN(C(C)C)C(C)C.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>ClCCl>[O:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[NH:10][C@@H:11]([CH2:15][CH:16]1[CH2:21][CH2:20][CH2:19][CH2:18][CH2:17]1)[C:12]([NH:33][CH2:32][CH2:31][NH:30][C:27]1[CH:28]=[CH:29][C:24]([O:23][CH3:22])=[CH:25][CH:26]=1)=[O:14]

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 12666396N~1~-(4-Methoxyphenyl)ethane-1,2-diamineHCID 210822522-(S)-(benzooxazol-2-ylamino)-3-cyclohexyl propionic acid

Product 1

HCID 6420159N~2~-1,3-Benzoxazol-2-YL-3-cyclohexyl-N-{2-[(4-methoxyphenyl)amino]ethyl}-L-alaninamideYield 56%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A slurry of L-cyclohexylalanine (2.44 g, 14.3 mmol) and powdered NaOH (1.14 g, 28.6 mmol) in DMSO (20 mL) was heated to 100° C. for 20 min until the mixture viscosity decreased and stirring was enabled. 2-Chlorobenzoxazole (1.99 g, 13.0 mmol) was added, and the solution was stirred at 100° C. for 4 h. Upon cooling to room temperature, the solution was poured into 1 M HCl. The precipitate was filtered and dried to afford 2-(S)-(benzooxazol-2-ylamino)-3-cyclohexyl propionic acid was isolated as a white powder (1.69 g, 41%). Step B. To a stirring solution of 2-(S)-(benzooxazol-2-ylamino)-3-cyclohexyl propionic acid (288 mg, 1.0 mmol), N1-(4-methoxy-phenyl)-ethane-1,2-diamine.2HCl (239 mg, 1.0 mmol), and iPr2NEt (0.87 mL, 5.0 mmol) in dichloromethane (4 mL) was added HATU (418 mg, 1.1 mmol). The solution was stirred at room temperature for 4 hours and then evaporated to dryness. The crude material was chromatographed over silica gel (Hexanes/EtOAc) to afford the title compound as a white powder (243 mg, 56%). HPLC-MS calcd. for C25H32N4O3 (M+H+) 437.25. found 437.5.

Workup

  1. customevaporated to dryness
  2. customThe crude material was chromatographed over silica gel (Hexanes/EtOAc)

Sources & evidence

ORD record
ord-dbd2ad8db4fa4a4d9a41c3551f1aeca2
Source dataset
uspto-grants-2007_02
Patent number
US07173051B2

Reaction notes

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