N-cyclopropyl-6-(trimethylstannyl)pyrazin-2-amine → 5-(3-(6-(cyclopropylamino)pyrazin-2-yl)-1-tosyl-1H-indol-5-yl)-N-(4-methoxybenzyl)-1,3,4-thiadiazol-2-amine

HRID 634136Notes

Reaction equation

HRID 634136 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.[CH:36]1([NH:39][C:40]2[CH:45]=[N:44][CH:43]=[C:42]([Sn](C)(C)C)[N:41]=2)[CH2:38][CH2:37]1>CN(C=O)C.C(Cl)Cl.[Cu]I.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH:36]1([NH:39][C:40]2[N:41]=[C:42]([C:2]3[C:10]4[C:5](=[CH:6][CH:7]=[C:8]([C:11]5[S:15][C:14]([NH:16][CH2:17][C:18]6[CH:19]=[CH:20][C:21]([O:24][CH3:25])=[CH:22][CH:23]=6)=[N:13][N:12]=5)[CH:9]=4)[N:4]([S:26]([C:29]4[CH:35]=[CH:34][C:32]([CH3:33])=[CH:31][CH:30]=4)(=[O:28])=[O:27])[CH:3]=3)[CH:43]=[N:44][CH:45]=2)[CH2:38][CH2:37]1

Participants

7

Reactant 2

HCID 68328378N-cyclopropyl-6-(trimethylstannyl)pyrazin-2-amineHCID 683285925-(3-iodo-1-tosyl-1H-indol-5-yl)-N-(4-methoxybenzyl)-1,3,4-thiadiazol-2-amine

Product 1

HCID 683282795-(3-(6-(cyclopropylamino)pyrazin-2-yl)-1-tosyl-1H-indol-5-yl)-N-(4-methoxybenzyl)-1,3,4-thiadiazol-2-amineYield 23.6%

Reagents, catalysts & solvents 4

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418397HCID 178418397, compoundCatalystHCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
100 °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 (543 mg, 0.881 mmol) and N-cyclopropyl-6-(trimethylstannyl)pyrazin-2-amine (350 mg, 1.175 mmol) in DMF (3 mL) followed by copper(i) iodide (223 mg, 1.175 mmol) and Pd(PPh3)4 (67.9 mg, 0.059 mmol). The reaction was stirred and heated in a Initiator microwave reactor (Personal Chemistry, Biotage AB, Inc., Uppsala, Sweden) at 100° C. for 1 h, then 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 20-60% EtOAc in Hex) to give 5-(3-(6-(cyclopropylamino)pyrazin-2-yl)-1-tosyl-1H-indol-5-yl)-N-(4-methoxybenzyl)-1,3,4-thiadiazol-2-amine (130 mg, 0.208 mmol, 17.74% for two steps). MS (ESI, pos. ion) m/z: 624 (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 20-60% EtOAc in Hex)

Sources & evidence

ORD record
ord-28e5dcb78c6b41df8b4fbb226c73287b
Source dataset
uspto-grants-2016_04
Patent number
US09321756B2

Reaction notes

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