Methyl 3-boronobenzenesulfonamide → 3-(2'-amino-1'-methyl-5'-oxo-2-phenyl-1',5'-dihydrospiro[chroman-4,4'-imidazole]-6-yl)-N-methylbenzenesulfonamide

HRID 2096457Notes

Reaction equation

HRID 2096457 reaction equation
[NH2:1][C:2]1[N:3]([CH3:24])[C:4](=[O:23])[C:5]2([C:15]3[C:10](=[CH:11][CH:12]=[C:13](Br)[CH:14]=3)[O:9][CH:8]([C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=3)[CH2:7]2)[N:6]=1.[CH3:25][NH:26][S:27]([C:30]1[CH:31]=[C:32](B(O)O)[CH:33]=[CH:34][CH:35]=1)(=[O:29])=[O:28]>O1CCOCC1.C([O-])([O-])=O.[Cs+].[Cs+].Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[NH2:1][C:2]1[N:3]([CH3:24])[C:4](=[O:23])[C:5]2([C:15]3[C:10](=[CH:11][CH:12]=[C:13]([C:32]4[CH:31]=[C:30]([S:27]([NH:26][CH3:25])(=[O:28])=[O:29])[CH:35]=[CH:34][CH:33]=4)[CH:14]=3)[O:9][CH:8]([C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=3)[CH2:7]2)[N:6]=1

Participants

6

Reactant 2

HCID 44886921Methyl 3-boronobenzenesulfonamideHCID 584237682'-amino-6-bromo-1'-methyl-2-phenylspiro[chroman-4,4'-imidazol]-5'(1'H)-one

Product 1

HCID 584241853-(2'-amino-1'-methyl-5'-oxo-2-phenyl-1',5'-dihydrospiro[chroman-4,4'-imidazole]-6-yl)-N-methylbenzenesulfonamideYield 24%

Reagents, catalysts & solvents 3

HCID 178418476HCID 178418476, compoundCatalystHCID 10796Cesium carbonateSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
120 °C

Procedure

Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(N-methylsulfamoyl)phenylboronic acid (23 mg, 0.104 mmol). The mixture was heated at 120° C. under Ar in microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-N-methylbenzenesulfonamide (5.88 mg, 24%). 1H-NMR (MeOD): 2.16 (m, 1H), 2.22 (m, 1H), 2.41 (m, 3H), 3.15 (m, 3H), 5.21 (m, 0.2H), 5.83 (m, 0.8H), 6.98 (m, 1H), 7.16 (m, 1H), 7.25 (m, 1H), 7.32 (m, 2H), 7.38 (m, 2H), 7.42 (m, 1H), 7.51 (m, 1H), 7.66 (m, 2H), 7.86 (m, 1H).

Workup

  1. concentrationThe reaction mixture was concentrated in vacuo
  2. customto give the residue, which
  3. customwas purified by preparative TLC

Sources & evidence

ORD record
ord-3bcb1b231591498a898706a9db4a4474
Source dataset
uspto-grants-2013_05
Patent number
US08450308B2

Reaction notes

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