Ethanol → tert-butyl N-[4-[3-[2-(hydroxymethyl)-6-methylphenyl]phenyl]sulfonyl-5-methylsulfanylthiophene-2-carboximidoyl]carbamate

HRID 723028Notes

Reaction equation

HRID 723028 reaction equation
[C:1]([O:5][C:6](=[O:27])[NH:7][C:8]([C:10]1[S:11][C:12]([S:25][CH3:26])=[C:13]([S:15]([C:18]2[CH:23]=[CH:22][CH:21]=[C:20](Br)[CH:19]=2)(=[O:17])=[O:16])[CH:14]=1)=[NH:9])([CH3:4])([CH3:3])[CH3:2].[CH3:28][C:29]1[C:34]2B(O)[O:36][CH2:37][C:33]=2[CH:32]=[CH:31][CH:30]=1.C([O-])([O-])=O.[Na+].[Na+].C(O)C>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.C1(C)C=CC=CC=1>[C:1]([O:5][C:6](=[O:27])[NH:7][C:8]([C:10]1[S:11][C:12]([S:25][CH3:26])=[C:13]([S:15]([C:18]2[CH:19]=[C:20]([C:34]3[C:33]([CH2:37][OH:36])=[CH:32][CH:31]=[CH:30][C:29]=3[CH3:28])[CH:21]=[CH:22][CH:23]=2)(=[O:17])=[O:16])[CH:14]=1)=[NH:9])([CH3:4])([CH3:3])[CH3:2]

Participants

7

Reactant 4

HCID 702EthanolHCID 10340Sodium CarbonateHCID 218861847-Methyl-1,3-dihydro-2,1-benzoxaborol-1-olHCID 145857672tert-butyl N-[4-(3-bromophenyl)sulfonyl-5-methylsulfanylthiophene-2-carboximidoyl]carbamate2×

Product 1

HCID 145857676tert-butyl N-[4-[3-[2-(hydroxymethyl)-6-methylphenyl]phenyl]sulfonyl-5-methylsulfanylthiophene-2-carboximidoyl]carbamateYield 40%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 1140TolueneSolvent

Procedure

The procedure used in Example 1: step c was followed using {[4-(3-bromo-benzenesulfonyl)-5-methylsulfanyl-thiophen-2-yl]-imino-methyl}-carbamic acid tert-butyl ester (Example 27 (50 mg, 0.1 mmol)), 7-methyl-3H-benzo[c][1,2]oxaborol-1-ol ((Example 5: step b) 59 mg, 0.4 mmol), Na2CO3 (2M, 0.8 mL, 1.6 mmol), Pd(PPh3)4 (29.4 mg, 0.025 mmol), ethanol (0.8 mL) and toluene (1.6 mL). Analogous aqueous workup and purification of the crude material by preparative TLC (40% EtOAc in hexanes) yielded the title compound (21 mg, 40%) as a light-yellow glass. 1H-NMR (CDCl3): δ 7.96 (m, 2H), 7.86 (m, 1H), 7.54 (m, 1H), 7.43 (m, 1H), 7.18–7.38 (m, 3H), 4.53 (d, 1H, J=13.3 Hz), 4.45 (d, 1H, J=13.3 Hz), 2.54 (s, 3H), 1.96 (s, 3H), 1.49 (s, 9H). ESI-MS (m/z): Calcd. for C25H28N2O5S3: 532.7; found: 532.9.

Workup

  1. customAnalogous aqueous workup and purification of the crude material by preparative TLC (40% EtOAc in hexanes)

Sources & evidence

ORD record
ord-173a6484d7784374999e807392968cf8
Source dataset
uspto-grants-2006_11
Patent number
US07138530B2

Reaction notes

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