Ethanol → HCID 59457531, Verbindung

Temperatur

80 °C

A solution of 6-bromo-2-iodo-pyridin-3-ylamine (as prepared in the previous step, 1.00 g, 3.35 mmol) in toluene (27 mL) and EtOH (13.5 mL) was treated with 2.0 M aq Na2CO3 (13.4 mL, 26.8 mmol) and 4,4-dimethyl-cyclohex-1-enylboronic acid (567 mg, 3.68 mmol). The mixture was degassed via sonication, placed under Ar, treated with Pd(PPh3)4 (271 mg, 0.234 mmol), and heated to 80° C. for 5 h. The cooled mixture was diluted with EtOAc (100 mL) and washed with water (2×50 mL). The combined aqueous layers were extracted with EtOAc (1×100 mL). The combined organic layers were dried over MgSO4 and concentrated in vacuo. Silica gel chromatography of the residue on a Varian MegaBond Elut 50-g column with 10% EtOAc-hexane afforded 668 mg (71%) of 6-bromo-2-(4,4-dimethyl-cyclohex-1-enyl)-pyridin-3-ylamine as a tan solid. 1H-NMR (CDCl3; 400 MHz): δ 7.06 (d, 1H, J=8.3 Hz), 6.85 (d, 1H, J=8.3 Hz), 5.95 (m, 1H), 3.86 (br s, 2H), 2.43-2.39 (m, 2H), 1.99-1.97 (m, 2H), 1.51 (t, 2H, J=6.4 Hz), 0.99 (s, 6H).

1. customThe mixture was degassed via sonication
2. washwashed with water (2×50 mL)
3. extractionThe combined aqueous layers were extracted with EtOAc (1×100 mL)
4. dry with materialThe combined organic layers were dried over MgSO4
5. concentrationconcentrated in vacuo

ORD-Eintrag

ord-231ec17542fa4545a5be13e67e2d0d30

Quelldatensatz

uspto-grants-2014_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08722718B2