Sodium Iodide → Succinic acid benzyl ester iodomethyl ester
Reaktionsgleichung
Cl[CH2:2][O:3][C:4](=[O:17])[CH2:5][CH2:6][C:7]([O:9][CH2:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)=[O:8].[I-:18].[Na+]>C(#N)C>[I:18][CH2:2][O:3][C:4](=[O:17])[CH2:5][CH2:6][C:7]([O:9][CH2:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)=[O:8]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
3-Benzyloxycarbonylpropionic acid chloromethyl ester (2 g, 1.38 mmole) was dissolved in acetonitrile (30 ml). Sodium iodide (1.6 g, 10.9 mmole) was added to the solution After reaction at 70° C. for 3 hr, the reaction mixture was filtered and the residue was dissolved in methylene chloride (20 ml) and refiltered. The solution was dried and gave internediate 3-benzyloxycarbonylpropionic acid iodomethyl ester in quantitative yield. This intermediate is bonded to an accessible function of a drag, such as a ring hydroxy or carboxy function using conventional alkylation/acylation conditions as described generally herein. Following deprotection of the terminal carboxy, a di/trifunctional linker bearing R2, such as 1,3-bis-O-(L-valyl)glycerol or iodomethyloxy-L-valyl is acylated/alkylated thereon or R2 amide bonded thereon by conventional techniques as described herein, such as with DCC coupling agent.