| PATENT ASSIGNEE'S COUNTRY | Canada |
| UPDATE | 09.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
Claim 4: Prepn method (a) Reacting PO4H3, formol & glycerol to give intermediate (I) (b) Protecting the 2 OH of phosphoric residue to give (IIa) (c) Coupling (IIa) with purine or pyrimidine nucleotide base to yield phosphonate ester (Ib) (d) Converting said ester to obtain title phosphonic acid |
| PATENT PHOTOCOPY | Available on request |
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