Diisopropylethylamine → (9H-Fluoren-9-yl)methyl (S)-1-((benzo[b]thiophen-3-ylmethyl)((S)-1,1-diethoxypropan-2-yl)amino)-1-oxopropan-2-ylcarbamate

HRID 1254504Notes

Reaction equation

HRID 1254504 reaction equation
[S:1]1[CH:5]=[C:4]([CH2:6][NH:7][C@@H:8]([CH3:16])[CH:9]([O:13][CH2:14][CH3:15])[O:10][CH2:11][CH3:12])[C:3]2[CH:17]=[CH:18][CH:19]=[CH:20][C:2]1=2.[NH:21]([C:27]([O:29][CH2:30][CH:31]1[C:43]2[C:38](=[CH:39][CH:40]=[CH:41][CH:42]=2)[C:37]2[C:32]1=[CH:33][CH:34]=[CH:35][CH:36]=2)=[O:28])[C@H:22]([C:24](O)=[O:25])[CH3:23].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.CCN(C(C)C)C(C)C>CN(C=O)C.CC(=O)OCC.O>[S:1]1[CH:5]=[C:4]([CH2:6][N:7]([C@@H:8]([CH3:16])[CH:9]([O:10][CH2:11][CH3:12])[O:13][CH2:14][CH3:15])[C:24](=[O:25])[C@@H:22]([NH:21][C:27](=[O:28])[O:29][CH2:30][CH:31]2[C:32]3[CH:33]=[CH:34][CH:35]=[CH:36][C:37]=3[C:38]3[C:43]2=[CH:42][CH:41]=[CH:40][CH:39]=3)[CH3:23])[C:3]2[CH:17]=[CH:18][CH:19]=[CH:20][C:2]1=2

Participants

8

Reactant 4

HCID 81531DiisopropylethylamineHCID 6364642N-((9H-Fluoren-9-ylmethoxy)carbonyl)-L-alanineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 67088371(S)-N-(benzo[b]thiophen-3-ylmethyl)-1,1-diethoxypropan-2-amine

Product 1

HCID 86652579(9H-Fluoren-9-yl)methyl (S)-1-((benzo[b]thiophen-3-ylmethyl)((S)-1,1-diethoxypropan-2-yl)amino)-1-oxopropan-2-ylcarbamateYield 64%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

According to the procedure described in the synthesis method of Compound III-1, (S)—N-(benzo[b]thiophen-3-ylmethyl)-1,1-diethoxypropan-2-amine (Compound IX-6) 13.2 g (45 mmol) and Fmoc-Ala-OH 18.3 g (58.8 mmol) were dissolved in DMF (200 ml). HATU (25.6 g, 67.5 mmol) and DIEA (8.7 g, 67.5 mmol) were added at room temperature. The mixture was stirred overnight at room temperature. The mixture was poured into water (800 ml). The solution was extracted with EA (300 ml×3). The combined extracts were dried over Na2SO4 and then filtered. The solvent was removed in vacuo. The residue was purified by column chromatography on silica gel is with PE:EA=30:1 to 5:1 to give the title compound 16.9 g, (yield 64%).

Workup

  1. extractionThe solution was extracted with EA (300 ml×3)
  2. dry with materialThe combined extracts were dried over Na2SO4
  3. filtrationfiltered
  4. customThe solvent was removed in vacuo
  5. customThe residue was purified by column chromatography on silica gel

Sources & evidence

ORD record
ord-33c16ea1278a409aa60666554a73f582
Source dataset
uspto-grants-2013_06
Patent number
US08455488B2

Reaction notes

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