反応 #71057

反応方程式

DIPEA

N2

methanesulfonic acid 4-(2-methyl-[1,3]dioxolan-2-yl)-pyridin-2-ylmethyl ester

4-nitro-2H-[1,2,3]triazole

→

title compound

4-(2-Methyl-[1,3]dioxolan-2-yl)-2-(4-nitro-[1,2,3]triazol-2-ylmethyl)-pyridine

溶媒

EA

Water

DMF

DMF

反応条件

後処理

1. 1
   workup.ADDITIONwere added
2. 2
   抽出The aq. layer was extracted with EA (10 mL)
3. 3
   乾燥extracts were dried over NaSO4
4. 4
   ろ過filtered
5. 5
   その他the solvents were removed under reduced pressure
6. 6
   その他Purification of the residue by FC (5:1 to 1:4 hept-EA)

実験手順

In a flame dried round-bottomed flask equipped with a magnetic stir bar and under inert atmosphere (N2), a solution of methanesulfonic acid 4-(2-methyl-[1,3]dioxolan-2-yl)-pyridin-2-ylmethyl ester (315 mg, 1.15 mmol) in DMF (2.0 mL) was added to a solution of 4-nitro-2H-[1,2,3]triazole (120 mg, 1.05 mmol) in DMF (2.0 mL) pre-treated for 30 min with DIPEA (0.36 mL, 2.10 mmol) and the reaction mixture was stirred for 48 h at 50° C. Water (10 mL), followed by EA (10 mL) were added. The aq. layer was extracted with EA (10 mL) and the combined org. extracts were dried over NaSO4, filtered, and the solvents were removed under reduced pressure. Purification of the residue by FC (5:1 to 1:4 hept-EA) gave the title compound as a pale yellow solid: TLC:rf (1:2 hept-EA)=0.24. LC-MS-conditions 02: tR=0.89 min, [M+H]+=292.27.

出典