反应 #1269849

反应方程式

(6aR,9aS)-5,6a,7,8,9,9a-hexahydro-3-chloro-5-methyl-2-(4-methoxy-benzyl)-cyclopent[4,5]imidazo[1,2-a]pyrrolo[4,3-e]pyrimidin-4(2H)-one

TFA

trifluoromethanesulfonic acid

→

(6aR,9aS)-5,6a,7,8,9,9a-hexahydro-3-chloro-5-methyl-cyclopent[4,5]imidazo[1,2-a]pyrrolo[4,3-e]pyrimidin-4(2H)-one

收率 116.4%

溶剂

CH2Cl2

反应条件

后处理

1. 1
   其他Solvents and TFA are removed under reduced pressure
2. 2
   workup.DISSOLUTIONdissolved in DMF
3. 3
   其他purified by a semi-preparative HPLC

实验过程

To a solution of (6aR,9aS)-5,6a,7,8,9,9a-hexahydro-3-chloro-5-methyl-2-(4-methoxy-benzyl)-cyclopent[4,5]imidazo[1,2-a]pyrrolo[4,3-e]pyrimidin-4(2H)-one (95 mg, 0.25 mmol) in CH2Cl2 is slowly added TFA and trifluoromethanesulfonic acid (TFMSA). The mixture is stirred at room temperature overnight. Solvents and TFA are removed under reduced pressure. The residue is neutralized and dissolved in DMF, and then purified by a semi-preparative HPLC to give 77 mg of (6aR,9aS)-5,6a,7,8,9,9a-hexahydro-3-chloro-5-methyl-cyclopent[4,5]imidazo[1,2-a]pyrrolo[4,3-e]pyrimidin-4(2H)-one. A suspension of (6aR,9aS)-5,6a,7,8,9,9a-hexahydro-3-chloro-5-methyl-cyclopent[4,5]imidazo[1,2-a]pyrrolo[4,3-e]pyrimidin-4(2H)-one (79 mg, 0.3 mmol), 2-(4-(chloromethyl)phenyl)pyridine (61 mg, 0.3 mmol) and cesium carbonate (192 mg, 0.6 mmol) in anhydrous DMF is stirred at room temperature for 4 h. The mixture is filtered through a 0.2 μL microfilter. The filtrate is purified by a semi-preparative HPLC to give pure product. MS (ESI) m/z 432.2 [M+H]+.

来源