A highly stereocontrolled and efficient synthesis of α- and β-pseudouridines
作者:Stephen Hanessian、Roger Machaalani
DOI:10.1016/j.tetlet.2003.09.103
日期:2003.11
A five-step practical and stereocontrolledsynthesis of α- and β-pseudouridines from d-ribonolactone is described. The key step involves a highly stereoselective reduction of a hemiketal C-nucleoside intermediate in each case. Multi-gram quantities of β-pseudouridine can now be made available.
作者:Sydney D. Bridges、Daniel M. Brown、Richard C. Ogden
DOI:10.1039/c39770000460
日期:——
The synthesis of 2′-deoxypseudouridine (2) is reported by condensation of 2,4-di-t-butoxy-5-lithiopyrimidine with 3,5-di-O-benzyl-2-deoxyribose and with 3,4-O-isopropylidene-2-deoxyribose (both giving the α-anomer also), and stereospecifically from pseudouridine (1)via a 4,2′-anhydro-intermediate and the 2′-chloro-2′-deoxynucleoside (4).