Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Diisopropylethylamine | HCID 81531 | — |
| Reactant | N-tert-Butoxycarbonyl-L-aspartic acid beta-benzyl ester | HCID 1581888 | — |
| Reactant | Methylamine hydrochloride | HCID 6364545 | — |
| Reactant | Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1) | HCID 9886157 | — |
| Solvent | Dichloromethane | HCID 6344 | — |
| Solvent | Dimethylacetamide | HCID 31374 | — |
| Product | Boc-Asp(OBzl)-NHMe | HCID 59516205 | 78.3% |
Reaction Steps
N,N-Diisopropylethylamine (15.10 g, 116.8 mmol) and HATU (10.77 g, 28.34 mmol) were added to a suspension of Boc-Asp-(OBzl)-OH (7.61 g, 23.54 mmol) and methylamine hydrochloride (5.03 g, 74.50 mmol) in DMA (31 mL). After stirring at room temperature for 18 h, the reaction mixture was diluted with CH2Cl2 and washed with saturated NaHCO3. The organic layer was washed with H2O several times, dried over Na2SO4, filtered, and concentrated. The residue was purified via silica gel chromatography with 0% MeOH in CH2Cl2 grading to 4% MeOH in CH2Cl2 to afford the titled product (6.2 g, 78%) as a white solid. 1H-NMR (CDCl3) δ: 1.471 (9H, s), 2.730 (1H, m), 2.818 (3H, d, J=4.8 Hz), 3.120 (1H, m), 4.520 (1H, s), 5.156 (2H, m), 5.660 (1H, s), 6.430 (1H, s), 7.378 (5H, m). LC-MS (ES) m/e 337.2 (M+H)+.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|
| Patent number | US07816395B2 |
|---|
| Source dataset | uspto-grants-2010_10 |
|---|
| ORD ID | ord-9dfe901d3ae04917b738f55545094cb1 |
|---|
| Source note | uspto-grants-2010_10 |
|---|
