Tributylvinyltin → Methyl 4-(4-ethenyl-1-ethyl-1H-pyrazol-5-yl)-2-thiophenecarboxylate

HRID 2392264Notes

Reaction equation

Br[C:2]1[CH:3]=[N:4][N:5]([CH2:16][CH3:17])[C:6]=1[C:7]1[CH:8]=[C:9]([C:12]([O:14][CH3:15])=[O:13])[S:10][CH:11]=1.[CH2:18]([Sn](CCCC)(CCCC)C=C)[CH2:19]CC>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>[CH:18]([C:2]1[CH:3]=[N:4][N:5]([CH2:16][CH3:17])[C:6]=1[C:7]1[CH:8]=[C:9]([C:12]([O:14][CH3:15])=[O:13])[S:10][CH:11]=1)=[CH2:19]

Participants

Conditions

Temperature: 90 °C

Procedure

A mixture of methyl 4-(4-bromo-1-ethyl-1H-pyrazol-5-yl)-2-thiophenecarboxylate (200 mg, 0.64 mmol), Pd(Ph3P)4 (73.3 mg, 0.06 mmol), and tributyl(ethenyl)stannane (302 mg, 0.95 mmol) was heated at 90° C. for 1 h under N2 in a sealed tube. The mixture was purified on Silica (10%-20% EtOAc in Hex) to give the title compound (151 mg, 76%): LC-MS (ES) m/z 263 (M+H)+.

Workup

customThe mixture was purified on Silica (10%-20% EtOAc in Hex)

Sources & evidence

ORD record: ord-48c41be9ebaa4bdc9e07846191a19e64
Source dataset: uspto-grants-2012_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08273782B2

Reaction notes

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