反应 #802

反应方程式

FC1(F)Oc2ccc(Br)cc2O

C1CNCCN1

→

FC1(F)Oc2ccc(N3CCNCC

收率 50.7%

溶剂

C1COCCO1

反应条件

实验过程

13-May-09 10:32:07 +0100 5-bromo-2,2-difluorobenzo[d][1,3]dioxole (0.500 g, 2.11 mmol), piperazine (0.182 g, 2.11 mmol) and BIS(TRI-T-BUTYLPHOSPHINE)PALLADIUM(0) (0.054 g, 0.11 mmol) and potassium 2-methylpropan-2-olate (0.349 g, 2.95 mmol) were suspended in dioxane (10vol) (10 mL) and heated to 90°C for 1 hour. LC-MS shows no starting material 52% product and 41% dimer. The reaction mixture was combined with EN02263-54 filtered and the crude product was purified by flash silica chromatography, elution gradient 0 to 10% MeOH in DCM. Pure fractions were evaporated to dryness to afford 1-(2,2-difluorobenzo[d][1,3]dioxol-5-yl)piperazine (0.259 g, 50.7 %) as a yellow oil.

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