反应详情

8.68 g of potassium t-butoxide was added to 80 ml of a tetrahydrofuran/hexamethylphosphoric triamide [4:1 (v/v)] mixture, followed by the cooling with ice. A solution of 9.51 g of the 6-((4-chlorobutyl)sulfinylmethyl)imidazo[1,2-a]pyridine prepared in the Preparative Example 8 in 30 ml of a tetrahydrofuran/hexamethylphosphoric triamide [4: 1 (v/v)] mixture was dropped into the obtained mixture. The obtained mixture was stirred for one hour, followed by the addition of ice-water. The obtained mixture was extracted with chloroform. The organic phase was dried over anhydrous magnesium sulfate and distilled to remove the solvent. The obtained oil was solidified by allowing to stand, followed by the addition of ether. The obtained mixture was filtered to give 5.84 g of the title compound as a dark-creamy powder (yield: 71%). The NMR spectroscopic analysis of this powder revealed that the powder was a mixture comprising two diastereomers at a ratio of about 2:1.

1. additionwas dropped into the obtained mixture
2. extractionThe obtained mixture was extracted with chloroform
3. dry with materialThe organic phase was dried over anhydrous magnesium sulfate
4. distillationdistilled
5. customto remove the solvent
6. additionfollowed by the addition of ether
7. filtrationThe obtained mixture was filtered