反应详情

To a stirred, cooled (0° C.) solution of 5-bromo-2-isopropyl-pyrimidine-4-carboxylic acid (3 g, 12.2 mmol) in methanol (50 ml) under an argon atmosphere was added dropwise thionyl chloride (4.37 g, 2.68 ml, 36.7 mmol). When the addition was complete, the mixture was allowed to warm to r.t. and stirring at r.t. was continued for 17 h. The orange mixture was concentrated to leave a paste which was taken up in EtOAc (50 ml)/saturated aqueous Na2CO3 solution (50 ml). The aqueous phase was extracted with EtOAc. The combined organics were washed with H2O and brine, dried over MgSO4, filtered and concentrated to leave the product (2.98 g, 94%) as a light brown oil which was used in the next reaction step without further purification.

1. additionWhen the addition
2. concentrationThe orange mixture was concentrated
3. customto leave a paste which
4. extractionThe aqueous phase was extracted with EtOAc
5. washThe combined organics were washed with H2O and brine
6. dry with materialdried over MgSO4
7. filtrationfiltered
8. concentrationconcentrated