Figure 4

Synthesis of 2-oxoesters. (a) i. 20% aq. sol. Cs2CO3, THF, H2O, ii. Br(CH2)nCH2CH2COOBut, DMF, reflux overnight; (b) Dess-Martin periodinane reagent, dry CH2Cl2; (c) 50% CF3COOH in CH2Cl2.
Synthesis of 2-oxoesters. (a) i. 20% aq. sol. Cs2CO3, THF, H2O, ii. Br(CH2)nCH2CH2COOBut, DMF, reflux overnight; (b) Dess-Martin periodinane reagent, dry CH2Cl2; (c) 50% CF3COOH in CH2Cl2.