Nitrogen → (5-(2-Methyl-[1,3]dioxolan-2-yl)-thiazol-2-yl)methyl methanesulfonate

Temperatur

0 °C

In a flame dried round-bottomed flask equipped with a magnetic stir bar and under inert atmosphere (N2), a solution of [5-(2-methyl-[1,3]dioxolan-2-yl)-thiazol-2-yl]-methanol (500 mg, 2.48 mmol) in dry CH2Cl2 (15 mL) was treated at 0° C. with Et3N (0.45 mL, 3.21 mmol) followed by DMAP (31 mg, 0.25 mmol) and Ms-Cl (0.25 mL, 3.14 mmol). After stirring at 0° C. for 1 h, the reaction was quenched with water (10 mL). The org. layer was dried over MgSO4, filtered, and the solvents were removed under reduced pressure to give crude (5-(2-methyl-[1,3]dioxolan-2-yl)-thiazol-2-yl)methyl methanesulfonate as a brown oil. This material was dissolved in dry DMF (10 mL) and treated with NaN3 (175 mg, 2.66 mmol) at 80° C. until completion of the reaction. The reaction mixture was then cooled down to rt and partitioned between EA and water. The layers were separated and the org. layer dried over MgSO4, filtered and concentrated under reduced pressure to give crude 2-(azidomethyl)-5-(2-methyl-[1,3]dioxolan-2-yl)-thiazole as a yellow oil. LC-MS-conditions 02: tR=0.86 min; [M+H]+=227.47.

1. customthe reaction was quenched with water (10 mL)
2. dry with materiallayer was dried over MgSO4
3. filtrationfiltered
4. customthe solvents were removed under reduced pressure

ORD-Eintrag

ord-d8108525e5c646bdb46542ba88a80a60

Quelldatensatz

uspto-grants-2013_10

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08563714B2