title: Selective diphosphorylation, dithiodiphosphorylation, triphosphorylation, and trithiotriphosphorylation of unprotected carbohydrates and nucleosides.
abstract: [chemical reaction: see text]. Aminomethyl polystyrene resin-bound linkers of p-acetoxybenzyl alcohol were subjected to reactions with diphosphitylating and triphosphitylating reagents to yield the corresponding polymer-bound diphosphitylating and triphosphitylating reagents, respectively. A number of unprotected carbohydrates and nucleosides were reacted with the polymer-bound reagents. Oxidation with tert-butyl hydroperoxide or sulfurization with Beaucage's reagent, followed by removal of cyanoethoxy group with DBU and the acidic cleavage, respectively, afforded only one type of monosubstituted nucleoside and carbohydrate diphosphates, dithiodiphosphates, triphosphates, and trithiotriphosphates with high regioselectivity.
authors.affiliation: Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, The University of Rhode Island, Kingston, Rhode Island 02881, USA.
authors.forename: Yousef
authors.initials: Y
authors.lastname: Ahmadibeni
authors.forename: Keykavous
authors.initials: K
authors.lastname: Parang
mesh_terms: D000438:Alcohols / Q000737:chemistry; D002241:Carbohydrates / Q000138:chemical synthesis / Q000737:chemistry*; D002384:Catalysis; D020650:Combinatorial Chemistry Techniques; D009705:Nucleosides / Q000138:chemical synthesis / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D010084:Oxidation-Reduction; D010766:Phosphorylation; D011137:Polystyrenes / Q000737:chemistry*
chemical_list: D000438:Alcohols; D002241:Carbohydrates; D009705:Nucleosides; D009943:Organophosphorus Compounds; D011137:Polystyrenes