Tetrabutylammonium Fluoride → 1-(3-fluoro-5-vinylpyridin-2-yl)-N-(6-fluorobenzo[d]thiazol-2-yl)-1,2,3,6-tetrahydropyridine-4-carboxamide

Temperatur

65 °C

687 mg of 1-(5-bromo-3-fluoropyridin-2-yl)-N-(6-fluorobenzo[d]thiazol-2-yl)-1,2,3,6-tetrahydropyridine-4-carboxamide 29 (1.52 mmol) and 0.05 eq. PdCl2dppf catalyst ([1,1′-bis(diphenylphosphino)ferrocene] dichloropalladium(II), 0.08 mMol, Sigma-Aldrich) were placed in a 50 mL vial with a screw-top septum and suspended in 2 mL dry THF. 2 Eq. 1M tetrabutylammonium fluoride in THF (3.04 mL, Sigma-Aldrich) were then added and the vial heated to 65° C. 1.1 Eq. vinylboronic acid pinacol ester (1.6 mMol, Sigma-Aldrich) were added to the vial via a syringe and the reaction progressed over 18 hours. The reaction mixture was transferred to a 500 mL extraction funnel and diluted with 250 mL water. The compound was extracted with 2×100 mL EtOAc. The organic layer was dried over sodium sulfate and concentrated under vacuum. The residue was chromatographed with a gradient of EtOAc in hexane. The fractions containing desired product (visualized by LC/MS) were concentrated and used without further purification or characterization.

1. extractionThe reaction mixture was transferred to a 500 mL extraction funnel
2. additiondiluted with 250 mL water
3. extractionThe compound was extracted with 2×100 mL EtOAc
4. dry with materialThe organic layer was dried over sodium sulfate
5. concentrationconcentrated under vacuum
6. customThe residue was chromatographed with a gradient of EtOAc in hexane
7. additionThe fractions containing desired product (visualized by LC/MS)
8. concentrationwere concentrated
9. customused without further purification or characterization

ORD-Eintrag

ord-0576c24e5793438e8cb4cf0ba0068748

Quelldatensatz

uspto-grants-2013_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08389549B2