Dimethylamine, hydrochloride → (2S,4S)-4-[4-(6-Amino-5-benzothiazol-2-ylpyridin-3-yl)-pyrazol-1-yl]-pyrrolidine-2-carboxylic acid dimethylamide

HRID 1926357Notes

Reaction equation

HRID 1926357 reaction equation
[NH2:1][C:2]1[N:7]=[CH:6][C:5]([C:8]2[CH:9]=[N:10][N:11]([C@@H:13]3[CH2:17][NH:16][C@H:15]([C:18]([OH:20])=O)[CH2:14]3)[CH:12]=2)=[CH:4][C:3]=1[C:21]1[S:22][C:23]2[CH:29]=[CH:28][CH:27]=[CH:26][C:24]=2[N:25]=1.Cl.[CH3:31][NH:32][CH3:33].CCN(C(C)C)C(C)C.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.[B-](F)(F)(F)F>CN(C=O)C>[CH3:31][N:32]([CH3:33])[C:18]([C@@H:15]1[CH2:14][C@H:13]([N:11]2[CH:12]=[C:8]([C:5]3[CH:6]=[N:7][C:2]([NH2:1])=[C:3]([C:21]4[S:22][C:23]5[CH:29]=[CH:28][CH:27]=[CH:26][C:24]=5[N:25]=4)[CH:4]=3)[CH:9]=[N:10]2)[CH2:17][NH:16]1)=[O:20]

Participants

6

Reactant 4

HCID 10473Dimethylamine, hydrochlorideHCID 81531DiisopropylethylamineHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 44160252(2S,4S)-4-[4-(6-Amino-5-benzothiazol-2-ylpyridin-3-yl)-pyrazol-1-yl]-pyrrolidine-2-carboxylic acid

Product 1

HCID 44160253(2S,4S)-4-[4-(6-Amino-5-benzothiazol-2-ylpyridin-3-yl)-pyrazol-1-yl]-pyrrolidine-2-carboxylic acid dimethylamide

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of (2S,4S)-4-[4-(6-amino-5-benzothiazol-2-ylpyridin-3-yl)-pyrazol-1-yl]-pyrrolidine-2-carboxylic acid (5.00 mg, 0.00969 mmol) in DMF (2 mL) at rt were added dimethylamine hydrochloride (20 mg, 0.25 mmol) and DIPEA (0.1 mL, 0.6 mmol), and the mixture was stirred for 1 min. TBTU (6.22 mg, 0.0194 mmol) was then added, and the solution was stirred for 10 min. The material was transferred to a separatory funnel. The organic layer was washed with water, and concentrated in vacuo. The material was loaded onto a prep TLC plate, eluting with 6% (7N NH3 in MeOH)/DCM. The band containing the product was collected and filtered off with 1:1 MeOH/DCM. The filtrate was concentrated in vacuo to afford the title compound as a yellow solid. 1H NMR (400 MHz, CD3OD): δ=2.15-2.21 (m, 1H), 2.82-2.91 (m, 1H), 3.00 (s, 3H), 3.12 (s, 3H), 3.23 (dd, J=12.4, 6.3 Hz, 1H), 3.49 (dd, J=12.0, 3.4 Hz, 1H), 4.15 (t, J=8.3 Hz, 1H), 4.98-5.05 (m, 1H), 7.42-7.47 (m, 1H), 7.53 (td, J=7.7, 1.3 Hz, 1H), 7.85 (s, 1H), 8.02 (dd, J=11.6, 7.8 Hz, 2H), 8.13 (s, 1H), 8.20 (d, J=2.3 Hz, 1H), 8.32 (d, J=2.0 Hz, 1H). MS (ES+): m/z=434.14 (100) [MH+]. HPLC: tR=2.12 min (ZQ2, polar—5 min).

Workup

  1. stirringthe solution was stirred for 10 min
  2. customThe material was transferred to a separatory funnel
  3. washThe organic layer was washed with water
  4. concentrationconcentrated in vacuo
  5. washeluting with 6% (7N NH3 in MeOH)/DCM
  6. additionThe band containing the product
  7. customwas collected
  8. filtrationfiltered off with 1:1 MeOH/DCM
  9. concentrationThe filtrate was concentrated in vacuo

Sources & evidence

ORD record
ord-7af8535b6aca4178933143e77d2c3c67
Source dataset
uspto-grants-2012_05
Patent number
US08178668B2

Reaction notes

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