Cyclopropanemethanamine → N-cyclopropylmethyl-4-methyl-3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzamide

HRID 1988881Notes

Reaction equation

HRID 1988881 reaction equation
[CH3:1][C:2]1[CH:10]=[CH:9][C:5]([C:6]([OH:8])=O)=[CH:4][C:3]=1[B:11]1[O:15][C:14]([CH3:17])([CH3:16])[C:13]([CH3:19])([CH3:18])[O:12]1.CCN(C(C)C)C(C)C.CN(C(ON1N=[N:44][C:39]2[CH:40]=[CH:41][CH:42]=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.C1(CN)CC1>CN(C=O)C>[CH:40]1([CH2:39][NH:44][C:6](=[O:8])[C:5]2[CH:9]=[CH:10][C:2]([CH3:1])=[C:3]([B:11]3[O:12][C:13]([CH3:19])([CH3:18])[C:14]([CH3:16])([CH3:17])[O:15]3)[CH:4]=2)[CH2:42][CH2:41]1

Participants

6

Reactant 4

HCID 75646CyclopropanemethanamineHCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 160860864-Methyl-3-(tetramethyl-1,3,2-dioxaborolan-2-yl)benzoic acid2×

Product 1

HCID 21914588N-cyclopropylmethyl-4-methyl-3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzamideYield 71.9%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

4-Methyl-3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzoic acid (Intermediate 4) (2.0 g) DIPEA (4-ml) and HATU (3.05 g) were dissolved in DMF (20 ml) and stirred at room temp for 15 min. Cyclopropylmethylamine (568 mg) was added and the mixture was stirred at room temp for 18 h. The solvent was removed under vacuum and the residue was partitioned between ethyl acetate (250 ml) and water (50 ml). The organic phase was washed with hydrochloric acid (2N, 50 ml) and aqueous sodium bicarbonate (1M, 50 ml) dried (magnesium sulphate) and concentrated under vacuum. The residue was absorbed onto silica and purified by flash column chromatography eluting with cyclohexane/ethyl acetate (4:1) to give the title compound (1.73 g).

Workup

  1. stirringthe mixture was stirred at room temp for 18 h
  2. customThe solvent was removed under vacuum
  3. customthe residue was partitioned between ethyl acetate (250 ml) and water (50 ml)
  4. washThe organic phase was washed with hydrochloric acid (2N, 50 ml) and aqueous sodium bicarbonate (1M, 50 ml)
  5. dry with materialdried (magnesium sulphate)
  6. concentrationconcentrated under vacuum
  7. customThe residue was absorbed onto silica
  8. custompurified by flash column chromatography
  9. washeluting with cyclohexane/ethyl acetate (4:1)

Sources & evidence

ORD record
ord-5518d3e9a1e047119bf861dac5750203
Source dataset
uspto-grants-2010_01
Patent number
US07642276B2

Reaction notes

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