Potassium Phosphate, Tribasic → 5-(3-(6-fluoropyridin-2-yl)-1-tosyl-1H-indol-5-yl)-N-(4-methoxybenzyl)-1,3,4-thiadiazol-2-amine

HRID 634139Notes

Reaction equation

HRID 634139 reaction equation
I[C:2]1[C:10]2[C:5](=[CH:6][CH:7]=[C:8]([C:11]3[S:15][C:14]([NH:16][CH2:17][C:18]4[CH:23]=[CH:22][C:21]([O:24][CH3:25])=[CH:20][CH:19]=4)=[N:13][N:12]=3)[CH:9]=2)[N:4]([S:26]([C:29]2[CH:35]=[CH:34][C:32]([CH3:33])=[CH:31][CH:30]=2)(=[O:28])=[O:27])[CH:3]=1.[F:36][C:37]1[N:42]=[C:41](B2OC(C)(C)C(C)(C)O2)[CH:40]=[CH:39][CH:38]=1.P([O-])([O-])([O-])=O.[K+].[K+].[K+]>O1CCOCC1.O.C(Cl)Cl.CC(P(C(C)(C)C)C1C=CC(N(C)C)=CC=1)(C)C.CC(P(C(C)(C)C)C1C=CC(N(C)C)=CC=1)(C)C.Cl[Pd]Cl>[F:36][C:37]1[N:42]=[C:41]([C:2]2[C:10]3[C:5](=[CH:6][CH:7]=[C:8]([C:11]4[S:15][C:14]([NH:16][CH2:17][C:18]5[CH:19]=[CH:20][C:21]([O:24][CH3:25])=[CH:22][CH:23]=5)=[N:13][N:12]=4)[CH:9]=3)[N:4]([S:26]([C:29]3[CH:30]=[CH:31][C:32]([CH3:33])=[CH:34][CH:35]=3)(=[O:28])=[O:27])[CH:3]=2)[CH:40]=[CH:39][CH:38]=1

Participants

7

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 426145762-Fluoro-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridineHCID 683285925-(3-iodo-1-tosyl-1H-indol-5-yl)-N-(4-methoxybenzyl)-1,3,4-thiadiazol-2-amine

Product 1

HCID 683283935-(3-(6-fluoropyridin-2-yl)-1-tosyl-1H-indol-5-yl)-N-(4-methoxybenzyl)-1,3,4-thiadiazol-2-amineYield 88%

Reagents, catalysts & solvents 3

HCID 11714597Bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II)CatalystHCID 6344DichloromethaneSolventHCID 218864351,4-Dioxane--water (1/1)Solvent

Conditions

Temperature
105 °C

Procedure

A glass microwave reaction vessel was charged with 5-(3-iodo-1-tosyl-1H-indol-5-yl)-N-(4-methoxybenzyl)-1,3,4-thiadiazol-2-amine (500 mg, 0.811 mmol) and 6-fluoropyridine-2-boronic acid pinacol ester (226 mg, 1.014 mmol) in p-dioxane/H2O (4:1, 7.5 mL) followed by potassium phosphate (430 mg, 2.028 mmol) and bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II) (28.7 mg, 0.041 mmol). The reaction was stirred and heated in a Initiator microwave reactor (Personal Chemistry, Biotage AB, Inc., Uppsala, Sweden) at 105° C. for 30 min. The mixture was diluted with DCM and washed with H2O. The organic layer was dried, filtered and concentrated. The residue was purified with silica gel chromatography (eluting with 5-15% EtOAc in DCM with 1% MeOH) to give 5-(3-(6-fluoropyridin-2-yl)-1-tosyl-1H-indol-5-yl)-N-(4-methoxybenzyl)-1,3,4-thiadiazol-2-amine (418 mg, 0.714 mmol, 88%) as a yellow solid. MS (ESI, pos. ion) m/z: 378 (M+1).

Workup

  1. customA glass microwave reaction vessel
  2. washwashed with H2O
  3. customThe organic layer was dried
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customThe residue was purified with silica gel chromatography (eluting with 5-15% EtOAc in DCM with 1% MeOH)

Sources & evidence

ORD record
ord-910bbcd04d29450abd971e6f440c5f10
Source dataset
uspto-grants-2016_04
Patent number
US09321756B2

Reaction notes

Loading…