Sodium Carbonate → HCID 71547691, compound

HRID 1771153Notes

Reaction equation

C(=O)([O:7][C:8]1[CH:13]=[CH:12][C:11]([F:14])=[C:10]([C:15]([C:17]2[CH:18]=[C:19]3[C:24](=[CH:25][CH:26]=2)[N:23]=[CH:22][C:21](Cl)=[N:20]3)=[O:16])[C:9]=1[F:28])OC(C)(C)C.[C:30]1(B(O)O)[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1.C([O-])([O-])=O.[Na+].[Na+]>O1CCOCC1.O.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[F:28][C:9]1[C:8]([OH:7])=[CH:13][CH:12]=[C:11]([F:14])[C:10]=1[C:15]([C:17]1[CH:18]=[C:19]2[C:24](=[CH:25][CH:26]=1)[N:23]=[CH:22][C:21]([C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1)=[N:20]2)=[O:16]

Participants

Conditions

Temperature: 100 °C

Procedure

A mixture of tert-butyl (3-(3-chloroquinoxaline-6-carbonyl)-2,4-difluorophenyl) carbonate (60 mg, 0.14 mmol, 1.0 eq.), phenylboronic acid (17 mg, 0.14 mmol, 1.1 eq.), Pd(dppf)2Cl2 (6 mg, 0.007 mmol, 0.05 eq.) and Na2CO3 (30 mg, 0.28 mmol, 2.0 eq.) in dioxane and water (9 mL/1 mL) was heated at 100° C. overnight under N2 protection, then cooled and concentrated. The resulting residue was purified via flash column chromatography (PE/EA=3/1, v/v) to (2,6-difluoro-3-hydroxyphenyl)(3-phenylquinoxalin-6-yl)methanone (15.4 mg, 30%). LRMS (M+H+) m/z calculated 363.1, found 363.0. 1H NMR (CDCl3, 400 MHz) δ 10.38 (s, 1 H), 9.76 (s, 1 H), 8.28-8.40 (m, 5 H), 7.60-7.62 (m, 3 H), 7.18-7.27 (m, 2 H).

Workup

temperaturecooled
concentrationconcentrated
customThe resulting residue was purified via flash column chromatography (PE/EA=3/1

Sources & evidence

ORD record: ord-a3474e1ec32a481aa87d70190f91c2fe
Source dataset: uspto-grants-2016_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09249111B2

Reaction notes

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