Synthesis of 5-Fluoroalkylated Pyrimidine Nucleosides via Negishi Cross-Coupling
摘要:
5-Fluoroalkylated pyrimidine nucleosides (1) have potential as therapeutic agents and molecular imaging agents targeting HSV1-tk suicide gene therapy. Thus, straightforward preparation of 5-fluoroalkylated nucleoside derivatives has been developed. Reported herein are the first examples of Pd-catalyzed Negishi cross-coupling of 3-N-benzoyl-3',5'-di-O-benzoyl-5-iodo-2'-deoxyuridine (2a) and 3-N-benzoyl-3',5'-di-O-benzoyl-5-iodo-2'-deoxy-2'-fluoroarabinouridine (2b) with unactivated CSp(3) fluoroalkylzinc bromides. This paper demonstrates the first synthesis of six 5-fluoroalkyl-2'-deoxypyrimidine nucleoside derivatives with three to five methylene chain lengths (5). Furthermore, this methodology has been extended to create a series of 13 5-alkyl-substituted nucleosides, including the target nucleosides 5 and 5-silyloxypropyl and 5-cyanobutyl derivatives.
Synthesis of 5-Fluoroalkylated Pyrimidine Nucleosides via Negishi Cross-Coupling
作者:Ann-Marie Chacko、Wenchao Qu、Hank F. Kung
DOI:10.1021/jo800444y
日期:2008.7.1
5-Fluoroalkylated pyrimidine nucleosides (1) have potential as therapeutic agents and molecular imaging agents targeting HSV1-tk suicide gene therapy. Thus, straightforward preparation of 5-fluoroalkylated nucleoside derivatives has been developed. Reported herein are the first examples of Pd-catalyzed Negishi cross-coupling of 3-N-benzoyl-3',5'-di-O-benzoyl-5-iodo-2'-deoxyuridine (2a) and 3-N-benzoyl-3',5'-di-O-benzoyl-5-iodo-2'-deoxy-2'-fluoroarabinouridine (2b) with unactivated CSp(3) fluoroalkylzinc bromides. This paper demonstrates the first synthesis of six 5-fluoroalkyl-2'-deoxypyrimidine nucleoside derivatives with three to five methylene chain lengths (5). Furthermore, this methodology has been extended to create a series of 13 5-alkyl-substituted nucleosides, including the target nucleosides 5 and 5-silyloxypropyl and 5-cyanobutyl derivatives.