Abstract Fluorination of 1-(5-O-trityl-3-deoxy-4-thio-β-D-threo-pentofuranosyl) uracil (17) and 1-(5-O-trityl-2-deoxy-4-thio-β-D-threo-pentofuranosyl) uracil (20) with DAST proceeded with exclusive retention of configuration. The structures of the products were confirmed by X-ray analysis.
[Otter, Graham P.; Elzagheid, Mohamed I.; Jones, Garry D.; MacCulloch, Alasdair C.; Walker, Richard T.; Oivanen, Mikko; Klika, Karel D. Journal of the Chemical Society. Perkin Transactions 2, 1998 , # 11 p. 2343 - 2349]
[Otter, Graham P.; Elzagheid, Mohamed I.; Jones, Garry D.; MacCulloch, Alasdair C.; Walker, Richard T.; Oivanen, Mikko; Klika, Karel D. Journal of the Chemical Society. Perkin Transactions 2, 1998 , # 11 p. 2343 - 2349]