Unanticipated retention of configuration in the DAST fluorination of deoxy-4′-thiopyrimidine nucleosides with “up” hydroxyl groups
作者:Lak S. Jeong、Marc C. Nicklaus、Cliff George、Victor E. Marquez
DOI:10.1016/s0040-4039(00)78345-6
日期:1994.10
Fluorination of 1-(5-O-trityl-3-deoxy-4-thio-beta-D-threo-pentofuranosyl)uracil (17) and 1-(5-O-trityl-2-deoxy-4-thio-beta-D-threo-pentofuranosyl)uracil (20) with DAST proceeded with exclusive retention of configuration. The structures of the products were confirmed by X-ray analysis.