Acetamide → N-{5-[4-(2-Trimethylsilanyl-ethoxymethyl)-4,7-dihydro-1-thia-4,5-diaza-cyclopenta[a]pentalen-6-yl]-pyridin-2-yl}-acetamide

HRID 532634Notes

Reaction equation

Br[C:2]1[N:7]=[CH:6][C:5]([C:8]2[C:12]3[CH2:13][C:14]4[S:15][CH:16]=[CH:17][C:18]=4[C:11]=3[N:10]([CH2:19][O:20][CH2:21][CH2:22][Si:23]([CH3:26])([CH3:25])[CH3:24])[N:9]=2)=[CH:4][CH:3]=1.[C:27]([NH2:30])(=[O:29])[CH3:28].C([O-])([O-])=O.[Cs+].[Cs+].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2>O1CCOCC1.CC([O-])=O.CC([O-])=O.[Pd+2]>[CH3:24][Si:23]([CH3:26])([CH3:25])[CH2:22][CH2:21][O:20][CH2:19][N:10]1[C:11]2[C:18]3[CH:17]=[CH:16][S:15][C:14]=3[CH2:13][C:12]=2[C:8]([C:5]2[CH:4]=[CH:3][C:2]([NH:30][C:27](=[O:29])[CH3:28])=[N:7][CH:6]=2)=[N:9]1

Participants

Conditions

Temperature: 100 °C

Procedure

A mixture of the corresponding intermediate 6-(6-Bromo-pyridin-3-yl)-4-(2-trimethylsilanyl-ethoxymethyl)-4,7-dihydro-1-thia-4,5-diaza-cyclopenta[a]pentalene (0.45 g, 1.0 mmol), acetamide (0.15 g, 2.5 mmol), Cs2CO3 (2 M, 3.0 mL), Xantphos (58 mg, 0.1 mmol) and Pd(OAc)2 (22 mg, 0.1 mmol) in dioxane (5 mL) was heated at 100° C. for 8 hr. The solution was cooled to room temperature and extracted with ethyl acetate. The target product was purified by gravity column chromatography (50% EtOAc in hexane) to give N-{5-[4-(2-Trimethylsilanyl-ethoxymethyl)-4,7-dihydro-1-thia-4,5-diaza-cyclopenta[a]pentalen-6-yl]-pyridin-2-yl}-acetamide as brown solid in 71% yield.

Workup

temperatureThe solution was cooled to room temperature
extractionextracted with ethyl acetate
customThe target product was purified by gravity column chromatography (50% EtOAc in hexane)

Sources & evidence

ORD record: ord-e3c9bc7762cf4e66a031468aa7391508
Source dataset: uspto-grants-2014_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08853207B2

Reaction notes

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