1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride → 1-(5-Chloroindol-2-ylsulphonyl)-4-[6-(4-pyridyl)nicotinoyl]piperazine

HRID 2085914Notes

Reaction equation

HRID 2085914 reaction equation
[N:1]1[CH:6]=[CH:5][C:4]([C:7]2[CH:15]=[CH:14][C:10]([C:11]([OH:13])=O)=[CH:9][N:8]=2)=[CH:3][CH:2]=1.[Cl:16][C:17]1[CH:18]=[C:19]2[C:23](=[CH:24][CH:25]=1)[NH:22][C:21]([S:26]([N:29]1[CH2:34][CH2:33][NH:32][CH2:31][CH2:30]1)(=[O:28])=[O:27])=[CH:20]2.Cl.CN(C)CCCN=C=NCC>CN(C)C=O>[Cl:16][C:17]1[CH:18]=[C:19]2[C:23](=[CH:24][CH:25]=1)[NH:22][C:21]([S:26]([N:29]1[CH2:34][CH2:33][N:32]([C:11](=[O:13])[C:10]3[CH:14]=[CH:15][C:7]([C:4]4[CH:3]=[CH:2][N:1]=[CH:6][CH:5]=4)=[N:8][CH:9]=3)[CH2:31][CH2:30]1)(=[O:28])=[O:27])=[CH:20]2

Participants

5

Reactant 3

HCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 22709453[2,4'-Bipyridine]-5-carboxylic acidHCID 227105715-chloro-2-(piperazine-1-sulfonyl)-1H-indole

Product 1

HCID 98913881-(5-Chloroindol-2-ylsulphonyl)-4-[6-(4-pyridyl)nicotinoyl]piperazineYield 70.5%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent2×

Procedure

A stirred suspension of 6-(4-pyridyl)nicotinic acid (400 mg, 2 mmol) in dimethylformamide, DMF, (10 ml) was treated with 1-(5-chloroindol-2-ylsulphonyl)piperazine (600 mg, 2 mmol, 1 mol eq.) and 1-(3-dimethylaminopropyl)-3-ethylcarbodi-imide hydrochloride (EDAC, 460 mg, 2.4 mmol, 1.2 mol eq.). After stirring overnight the solvent was removed in vacuo and the residue chromatographed (Isolute 20 g silica cartridge, eluting with dichloromethane containing 2.5%-5% v/v of methanol) to yield 1-(5-chloroindol-2-ylsulphonyl)-4-[6-(4-pyridyl)nicotinoyl]piperazine as a colourless foam (680 mg). This was dissolved in dichloromethane/methanol mixture (40 ml of 1:1) and treated with a saturated solution of HCI in methanol until acid to indicator paper (slight excess). The resulting solution of hydrochloride salt was evaporated to dryness and the residue boiled in 2-propanol (100 ml, incomplete solution). Filtration and cooling gave 1-(5-chloroindol-2-ylsulphonyl)-4-[6-(4-pyridyl)nicotinoyl]piperazine hydrochloride as a colourless solid, (220 mg), 1H NMR (d6-DMSO) 3.0-3.3 (broad d, 4H), 3.6-4.0 (broad d, 4H), 7.05 (s, 1H), 7.35 (dd, 1H), 7.5 (d, 1H), 7.8 (d, 1H), 8.1 (dd, 1H), 8.35 (d, 1H), 8.5 (m, 2H), 8.8 (d, 1H), 8.95 (d, 2H), 12.4 (s, 1H), signals were also present due to 2-propanol (0.5 mol equiv.); MS (M+H)+ 481/483; mp 186-190° C. (not sharp).

Workup

  1. customwas removed in vacuo
  2. customthe residue chromatographed (Isolute 20 g silica cartridge
  3. washeluting with dichloromethane containing 2.5%-5% v/v of methanol)

Sources & evidence

ORD record
ord-9aa1dd140299491290fd1113bb771799
Source dataset
uspto-grants-2004_04
Patent number
US06723723B1

Reaction notes

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