Cesium carbonate → benzhydrylidene-[6-methyl-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazin-2-yl]-amine

HRID 905988Notes

Reaction equation

Br[C:2]1[N:3]=[C:4]2[CH:10]=[C:9]([CH3:11])[N:8]([CH2:12][O:13][CH2:14][CH2:15][Si:16]([CH3:19])([CH3:18])[CH3:17])[C:5]2=[N:6][CH:7]=1.[C:20](=[NH:33])([C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1)[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1.C([O-])([O-])=O.[Cs+].[Cs+].C1C=CC(P(C2C(C3C(P(C4C=CC=CC=4)C4C=CC=CC=4)=CC=C4C=3C=CC=C4)=C3C(C=CC=C3)=CC=2)C2C=CC=CC=2)=CC=1>C1COCC1.CC([O-])=O.CC([O-])=O.[Pd+2]>[C:20](=[N:33][C:2]1[N:3]=[C:4]2[CH:10]=[C:9]([CH3:11])[N:8]([CH2:12][O:13][CH2:14][CH2:15][Si:16]([CH3:19])([CH3:18])[CH3:17])[C:5]2=[N:6][CH:7]=1)([C:27]1[CH:28]=[CH:29][CH:30]=[CH:31][CH:32]=1)[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1

Participants

Conditions

Temperature: 100 °C

Procedure

2-Bromo-6-methyl-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine (0.340 g, 0.993 mmol), benzhydrylideneamine (0.18 mL, 1.09 mmol), Cs2CO3 (648 mg, 1.99 mmol), Pd(OAc)2 (22 mg, 0.099 mmol) and BINAP (62 mg, 0.099 mmol) were dissolved in THF (10 mL) and heated at 100° C. for 64 hr, cooled to RT, partitioned between EtOAc and brine. The organic layer was dried (MgSO4), filtered, concentrated, and purified by SiO2 chromatography (40 g SiO2, hexanes/EtOAc 0-35% EtOAc) to give 158 mg of benzhydrylidene-[6-methyl-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazin-2-yl]-amine as a yellow liquid (36% yield).

Workup

temperaturecooled to RT
custompartitioned between EtOAc and brine
dry with materialThe organic layer was dried (MgSO4)
filtrationfiltered
concentrationconcentrated
custompurified by SiO2 chromatography (40 g SiO2, hexanes/EtOAc 0-35% EtOAc)

Sources & evidence

ORD record: ord-454f359faaf4401ab72e071484cb1a73
Source dataset: uspto-grants-2011_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08012974B2

Reaction notes

Loading…