Tris(1,1-dimethylethyl)phosphine → 4-(5-cyano-1-methyl-1H-pyrrol-2-yl)-N-ethyl-3-fluorobenzenesulfonamide

HRID 2239445Notes

Reaction equation

HRID 2239445 reaction equation
Br[C:2]1[CH:7]=[CH:6][C:5]([S:8]([NH:11][CH2:12][CH3:13])(=[O:10])=[O:9])=[CH:4][C:3]=1[F:14].[C:15]([C:17]1[N:21]([CH3:22])[C:20](B(O)O)=[CH:19][CH:18]=1)#[N:16].[F-].[K+].C(P(C(C)(C)C)C(C)(C)C)(C)(C)C>C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[C:15]([C:17]1[N:21]([CH3:22])[C:20]([C:2]2[CH:7]=[CH:6][C:5]([S:8]([NH:11][CH2:12][CH3:13])(=[O:10])=[O:9])=[CH:4][C:3]=2[F:14])=[CH:19][CH:18]=1)#[N:16]

Participants

6

Reactant 4

HCID 83681Tris(1,1-dimethylethyl)phosphineHCID 522689Potassium FluorideHCID 11708078(5-cyano-1-methyl-1H-pyrrol-2-yl)boronic acidHCID 684751604-bromo-N-ethyl-3-fluorobenzenesulfonamide

Product 1

HCID 250052654-(5-cyano-1-methyl-1H-pyrrol-2-yl)-N-ethyl-3-fluorobenzenesulfonamideYield 24.3%

Reagents, catalysts & solvents 1

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalyst

Procedure

According to general procedure B, 4-bromo-N-ethyl-3-fluorobenzenesulfonamide (166 mg, 0.59 mmol), 5-cyano-1-methyl-1H-pyrrol-2-ylboronic acid (106 mg, 0.70 mmol), potassium fluoride (113 mg, 1.95 mmol), and tris(dibenzylideneacetone)dipalladium (0) (15 mg, 0.01 mmol) were placed in an oven dried flask under nitrogen and dry THF (1.4 mL) was added. Tri-t-butylphosphine (89 μL, 0.02 mmol, 10 wt % in hexane) was added and the reaction was stirred for 16 hours. 4-(5-cyano-1-methyl-1H-pyrrol-2-yl)-N-ethyl-3-fluorobenzenesulfonamide (44 mg, 24%) was provided after purification. HRMS: calcd for C14H14FN3O2S, 307.07907; found (EI, M+.), 307.0792. HPLC purity 99.5% at 210-370 nm, 8.7 min.; the Xterra® RP18 column, 3.5μ, 150×4.6 mm column, 1.2 mL/min., 85/15-5/95 (ammonium formate buffer pH=3.5/ACN+MeOH) for 10 min., hold 4 min.

Workup

  1. customwere placed in an oven
  2. customdried flask under nitrogen
  3. additiondry THF (1.4 mL) was added

Sources & evidence

ORD record
ord-134de4a91df346dc81e8a90d280b9568
Source dataset
uspto-grants-2010_05
Patent number
US07723332B2

Reaction notes

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