Pivalaldehyde → HCID 67417662, compound

HRID 1295889Notes

Reaction equation

HRID 1295889 reaction equation
[NH2:1][C:2]1[CH:3]=[CH:4][CH:5]=[C:6]2[C:10]=1[C:9](=[O:11])[N:8]([C@@H:12]([C:19]1[CH:24]=[CH:23][C:22]([O:25][CH3:26])=[C:21]([O:27][CH2:28][CH3:29])[CH:20]=1)[CH2:13][C:14]([N:16]([CH3:18])[CH3:17])=[O:15])[CH2:7]2.[CH3:30][C:31]([CH3:35])([CH3:34])[CH:32]=O.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCCl>[CH3:30][C:31]([CH3:35])([CH3:34])[CH2:32][NH:1][C:2]1[CH:3]=[CH:4][CH:5]=[C:6]2[C:10]=1[C:9](=[O:11])[N:8]([C@@H:12]([C:19]1[CH:24]=[CH:23][C:22]([O:25][CH3:26])=[C:21]([O:27][CH2:28][CH3:29])[CH:20]=1)[CH2:13][C:14]([N:16]([CH3:18])[CH3:17])=[O:15])[CH2:7]2

Participants

5

Reactant 3

HCID 12417PivalaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 66718493HCID 66718493, compound

Product 1

HCID 67417662HCID 67417662, compoundYield 99%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

To a solution of (3R)-3-(7-amino-1-oxo-1,3-dihydro-isoindol-2-yl)-3-(3-ethoxy-4-methoxyphenyl)-N,N-dimethylpropionamide (0.5 g, 1.3 mmol) and trimethylacetaldehyde (0.26 mL, 2.3 mmol) in 1,2-dichloroethane (10 mL), was added sodium triacetoxyborohydride (0.53 g, 2.5 mmol) at room temperature. After 1 day, the mixture was extracted with methylene chloride (50 mL) and water (20 mL). The organic layer was washed with sodium hydrogen carbonate (sat, 25 mL) and brine (25 mL), and dried over MgSO4. Removal of solvent gave a yellow oil, which was purified by prep HPLC to give (3R)-3-[7-(2,2-dimethyl-propylamino)-1-oxo-1,3-dihydro-isoindol-2-yl]-3-(3-ethoxy-4-methoxyphenyl)-N,N-dimethyl-propionamide as a white solid (0.59 g, 99% yield): mp 111-113° C.; 1H NMR (CDCl3) δ 1.01 (s, 9H, 3 CH3), 1.43 (t, J=7 Hz, 3H, CH3), 2.89 (s, 3H, CH3), 2.98 (d, J=6 Hz, 2H, CH2), 3.07 (dd, J=6, 15 Hz, 1H, CHH), 3.11 (s, 3H, CH3), 3.45 (dd, J=9, 15 Hz, 1H, CHH), 3.84 (s, 3H, CH3), 4.08 (q, J=7 Hz, 2H, CH2), 4.12 (d, J=16 Hz, 1H, CHH), 4.33 (d, J=16 Hz, 1H, CHH), 5.59 (dd, J=7, 9 Hz, 1H, NCH), 6.47-6.51 (m, 2H, Ar), 6.79-7.01 (m, 4H, NH, Ar), 7.22 (t, J=8 Hz, 1H, Ar); 13C NMR (CDCl3) δ 14.75, 27.63, 32, 27, 35.52, 36.67, 37.54, 48.56, 53.10, 54.49, 55.95, 64.42, 107.82, 108.77, 111.25, 112.66, 114.58, 119.22, 132.35, 132.96, 143.09, 148.16, 148.41, 148.81, 169.97, 170.79. Analy. calculated for C27H37N3O4: C, 69.35; H, 7.98; N, 8.99. Found: C, 69.70; H, 7.95; N, 8.74.

Workup

  1. extractionthe mixture was extracted with methylene chloride (50 mL) and water (20 mL)
  2. washThe organic layer was washed with sodium hydrogen carbonate (sat, 25 mL) and brine (25 mL)
  3. dry with materialdried over MgSO4
  4. customRemoval of solvent
  5. customgave a yellow oil, which
  6. customwas purified by prep HPLC

Sources & evidence

ORD record
ord-bd9c1feb90c3401b8e4bad19d2c1cd63
Source dataset
uspto-grants-2007_07
Patent number
US07244759B2

Reaction notes

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