反应详情

Sodium hydride (5.3 g, 0.22 mol) was added to a stirred slurry of 3-benzyloxycarbonylamino-6-methyl-2-pyridinone (16-2; 53.2 g, 0.20 mol) in THF at 0° C. t-Butylbromoacetate (45 ml, 0.27 mol) was added to the resulting solution and a precipitate rapidly forms. The reaction was warmed to rt over 1 h and after 2 h the solvent was evaporated in vacuo and the residue was partitioned between 1:1 water/brine (200 ml) and 6:1 THF/methylene chloride (700 ml). The organic layer was dried (Na2SO4) and evaporated in vacuo to a solid which was triturated with hexane to give the title compound 16-3 as a crystalline solid:

1. additionwas added to the resulting solution
2. customwas evaporated in vacuo
3. customthe residue was partitioned between 1:1 water/brine (200 ml) and 6:1 THF/methylene chloride (700 ml)
4. dry with materialThe organic layer was dried (Na2SO4)
5. customevaporated in vacuo to a solid which
6. customwas triturated with hexane