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Toluene → 4-(5-Tert-butoxy-biphenyl-3-sulfonyl)-5-methylsulfanyl-thiophene-2-carboxylic acid ethyl ester

HRID 723041
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Reaction equation

HRID 723041 reaction equation
[C:1]1(B(O)O)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH3:10][O:11][C:12]([C:14]1[S:15][C:16]([S:34][CH3:35])=[C:17]([S:19]([C:22]2[CH:27]=[C:26]([O:28][C:29]([CH3:32])([CH3:31])[CH3:30])[CH:25]=[C:24](Br)[CH:23]=2)(=[O:21])=[O:20])[CH:18]=1)=[O:13].[C:36]([O-])([O-])=O.[Na+].[Na+].C1(C)C=CC=CC=1>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.CCOC(C)=O.C(O)C>[CH2:10]([O:11][C:12]([C:14]1[S:15][C:16]([S:34][CH3:35])=[C:17]([S:19]([C:22]2[CH:23]=[C:24]([C:1]3[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=3)[CH:25]=[C:26]([O:28][C:29]([CH3:32])([CH3:31])[CH3:30])[CH:27]=2)(=[O:21])=[O:20])[CH:18]=1)=[O:13])[CH3:36]
ParticipantsProcedureSources & evidenceReaction notes

Participants

8

Reactant 4

HCID 1140TolueneHCID 10340Sodium CarbonateHCID 66827Phenylboronic AcidHCID 210571734-(3-Bromo-5-tert-butoxy-benzenesulfonyl)-5-methylsulfanyl-thiophene-2-carboxylic acid methyl ester

Product 1

HCID 695864274-(5-Tert-butoxy-biphenyl-3-sulfonyl)-5-methylsulfanyl-thiophene-2-carboxylic acid ethyl esterYield 65.9%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 702EthanolSolventHCID 8857Ethyl AcetateSolvent

Procedure

The procedure used in Example 1: step d was followed using benzeneboronic acid (42 mg, 0.35 mmol), 4-(3-bromo-5-tert-butoxy-benzenesulfonyl)-5-methylsulfanyl-thiophene-2-carboxylic acid methyl ester ((Example 12: step c) (83 mg, 0.17 mmol)), Na2CO3 (2M, 1.4 mL, 2.8 mmol), Pd(PPh3)4 (48 mg, 0.04 mmol), toluene (5.6 mL), and ethanol (2.8 mL). Analogous aqueous workup and SiO2 flash chromatography (20% EtOAc in hexanes) yielded the title compound (55 mg, 65%). 1H-NMR (CDCl3): δ 8.03 (s, 1H), 7.91 (t, 1H, J=1.6 Hz), 7.63 (t, 1H, J=2.0 Hz), 7.57 (m, 2H), 7.47 (m, 2H), 7.41 (m, 2H), 4.33 (q, 2H, J=7.2 Hz), 2.60 (s, 3H), 1.42 (s, 9H), 1.36 (t, 3H, J=7.2 Hz).

Sources & evidence

ORD record
ord-b4343ef4b9f2416cb7c9af41026a5576
Source dataset
uspto-grants-2006_11
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07138530B2

Reaction notes

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On this pageParticipantsProcedureSources & evidenceReaction notes