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

HRID 634171Notes

Reaction equation

HRID 634171 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.[Cl: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>[Cl: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 177504912-Chloro-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 867251045-(3-(6-chloropyridin-2-yl)-1-tosyl-1H-indol-5-yl)-N-(4-methoxybenzyl)-1,3,4-thiadiazol-2-amineYield 90.3%

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 (300 mg, 0.487 mmol) and 6-chloropyridine-2-boronic acid pinacol ester (175 mg, 0.730 mmol) in p-dioxane/H2O (4:1, 5 mL) followed by bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II) (17.23 mg, 0.024 mmol) and potassium phosphate (310 mg, 1.460 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 0-20% EtOAc in DCM) to give 5-(3-(6-chloropyridin-2-yl)-1-tosyl-1H-indol-5-yl)-N-(4-methoxybenzyl)-1,3,4-thiadiazol-2-amine (265 mg, 0.440 mmol, 90%) as a yellow solid. MS (ESI, pos. ion) m/z: 602 (M+1); 1H NMR (400 MHz, CDCl3) δ ppm 8.73 (1H, d, J=1.4 Hz), 8.14 (1H, s), 8.05 (1H, d, J=8.8 Hz), 7.92 (1H, dd, J=8.7, 1.7 Hz), 7.81 (2H, d, J=8.2 Hz), 7.68-7.75 (1H, m), 7.59-7.66 (1H, m), 7.33 (2H, d, J=8.6 Hz), 7.24 (2H, d, J=3.7 Hz), 6.90 (2H, d, J=8.8 Hz), 4.54 (2H, s), 3.81 (3H, s), 2.35 (3H, s).

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 0-20% EtOAc in DCM)

Sources & evidence

ORD record
ord-6b06da4bdc6f4beb909436b187509671
Source dataset
uspto-grants-2016_04
Patent number
US09321756B2

Reaction notes

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