Isopropylamine → N-isopropyl-5-(3-(2-(isopropylamino)pyrimidin-4-yl)-1H-indol-5-yl)-1,3,4-oxadiazol-2-amine

HRID 634322Notes

Reaction equation

HRID 634322 reaction equation
Cl[C:2]1[N:7]=[C:6]([C:8]2[C:16]3[C:11](=[CH:12][CH:13]=[C:14]([C:17]4[O:21][C:20]([NH:22][CH:23]([CH3:25])[CH3:24])=[N:19][N:18]=4)[CH:15]=3)[N:10](S(C3C=CC(C)=CC=3)(=O)=O)[CH:9]=2)[CH:5]=[CH:4][N:3]=1.[CH:36]([NH2:39])([CH3:38])[CH3:37].[OH-].[Na+]>CN1C(=O)CCC1>[CH:23]([NH:22][C:20]1[O:21][C:17]([C:14]2[CH:15]=[C:16]3[C:11](=[CH:12][CH:13]=2)[NH:10][CH:9]=[C:8]3[C:6]2[CH:5]=[CH:4][N:3]=[C:2]([NH:39][CH:36]([CH3:38])[CH3:37])[N:7]=2)=[N:18][N:19]=1)([CH3:25])[CH3:24]

Participants

5

Reactant 3

HCID 6363IsopropylamineHCID 14798Sodium HydroxideHCID 867251205-(3-(2-chloropyrimidin-4-yl)-1-tosyl-1H-indol-5-yl)-N-isopropyl-1,3,4-oxadiazol-2-amine

Product 1

HCID 68328302N-isopropyl-5-(3-(2-(isopropylamino)pyrimidin-4-yl)-1H-indol-5-yl)-1,3,4-oxadiazol-2-amineYield 39.3%

Reagents, catalysts & solvents 1

HCID 13387N-methyl-2-pyrrolidoneSolvent

Conditions

Temperature
100 °C

Procedure

A glass microwave reaction vessel was charged with 5-(3-(2-chloropyrimidin-4-yl)-1-tosyl-1H-indol-5-yl)-N-isopropyl-1,3,4-oxadiazol-2-amine (100 mg, 0.196 mmol) and isopropylamine (16.88 μl, 0.196 mmol) in NMP (2.0 mL). The reaction mixture was stirred and heated in an Initiator microwave reactor (Personal Chemistry, Biotage AB, Inc., Upssala, Sweden) at 135° C. for 1 h. aq. NaOH (0.5 mL, 5 M) was added to the mixture and the reaction was heated in the microwave at 100° C. for 20 min. The mixture was purified with preparative HPLC (eluting with 10-50% MeCN in water with 0.1% TFA in each solvent) and the fractions containing the product were combined and concentrated in vacuo to remove MeCN. The resulting mixture was extracted with CHCl3/iPrOH (4:1) and the combined organic layers were dried (MgSO4), filtered and concentrated to give N-isopropyl-5-(3-(2-(isopropylamino)pyrimidin-4-yl)-1H-indol-5-yl)-1,3,4-oxadiazol-2-amine (29 mg, 0.077 mmol, 39.1% yield) as a yellow solid. MS (ESI, pos. ion) m/z: 378.0 (M+1); 1H NMR (400 MHz, DMSO-d6) δ ppm 11.95 (1H, s), 8.99 (1H, br. s.), 8.30 (1H, s), 8.17 (1H, d, J=5.1 Hz), 7.64 (1H, dd, J=8.5, 1.5 Hz), 7.57 (1H, d, J=8.6 Hz), 7.45 (1H, d, J=7.2 Hz), 7.00 (1H, d, J=5.3 Hz), 6.70 (1H, br. s.), 4.17-4.29 (1H, m), 3.71-3.83 (1H, m), 1.20-1.30 (12H, m).

Workup

  1. customA glass microwave reaction vessel
  2. additionwas added to the mixture
  3. customThe mixture was purified with preparative HPLC (
  4. washeluting with 10-50% MeCN in water with 0.1% TFA in each solvent) and the fractions
  5. additioncontaining the product
  6. concentrationconcentrated in vacuo
  7. customto remove MeCN
  8. extractionThe resulting mixture was extracted with CHCl3/iPrOH (4:1)
  9. dry with materialthe combined organic layers were dried (MgSO4)
  10. filtrationfiltered
  11. concentrationconcentrated

Sources & evidence

ORD record
ord-f440d8ae3dba4e6489d68e7536632e40
Source dataset
uspto-grants-2016_04
Patent number
US09321756B2

Reaction notes

Loading…