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result sql = Synthesis of nucleoside mono-, di-, and triphosphoramidates from solid-phase cyclosaligenyl phosphitylating reagents.
Synthesis of nucleoside mono-, di-, and triphosphoramidates from solid-phase cyclosaligenyl phosphitylating reagents.
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char = a;code = 97
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char = y;code = 121
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char = p;code = 112
char = h;code = 104
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char = y;code = 121
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char = t;code = 116
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result sql = Chloromethyl polystyrene resin was reacted with 5-hydroxysalicylaldehyde in the presence of potassium carbonate to afford polymer-bound 2-hydroxybenzaldehyde. Subsequent reduction with borane solution produced polymer-bound 2-hydroxybenzyl alcohol. The reaction of immobilized 2-hydroxybenzyl alcohol with appropriate phosphitylating reagents yielded solid-phase cycloSaligenyl mono-, di-, and triphosphitylating reagents, which were reacted with unprotected nucleosides, followed by iodine oxidation, deprotection of cyanoethoxy groups, and the basic cleavage, respectively, to afford 5'-O-nucleoside mono-, di-, and triphosphoramidates in 52-73% overall yield.

Publication: Org. Lett. 2009 May 21 ;11(10)::2157-60. :doi: 10.1021/ol900320r.
Publication Date: 2009 May 21
Study Author(s): Ahmadibeni, Yousef;Tiwari, Rakesh K;Sun, Gongqin;Parang, Keykavous;
Institution: Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, The University of Rhode Island, Kingston, Rhode Island 02881, USA.
Shortcut link to this study:
Chloromethyl polystyrene resin was reacted with 5-hydroxysalicylaldehyde in the presence of potassium carbonate to afford polymer-bound 2-hydroxybenzaldehyde. Subsequent reduction with borane solution produced polymer-bound 2-hydroxybenzyl alcohol. The reaction of immobilized 2-hydroxybenzyl alcohol with appropriate phosphitylating reagents yielded solid-phase cycloSaligenyl mono-, di-, and triphosphitylating reagents, which were reacted with unprotected nucleosides, followed by iodine oxidation, deprotection of cyanoethoxy groups, and the basic cleavage, respectively, to afford 5'-O-nucleoside mono-, di-, and triphosphoramidates in 52-73% overall yield.
PMID: 19364114

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