中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | [6-Diphenylcarbamoyloxy-2-(isobutyrylamino)purin-7-yl]acetic acid methyl ester | —— | C25H24N6O5 | 488.503 |
—— | [6-Diphenylcarbamoyloxy-2-(isobutyrylamino)purin-9-yl]acetic acid | 263254-57-5 | C24H22N6O5 | 474.476 |
—— | [6-Diphenylcarbamoyloxy-2-(isobutyrylamino)purin-9-yl]acetic acid methyl ester | 263254-49-5 | C25H24N6O5 | 488.503 |
—— | [6-Diphenylcarbamoyloxy-2-(isobutyrylamino)purin-9-yl]acetic acid tert-butyl ester | 263254-48-4 | C28H30N6O5 | 530.583 |
—— | ({2-[6-Diphenylcarbamoyloxy-2-(isobutyrylamino)purin-9-yl]acetyl}-[2-(9H-fluoren-9-ylmethoxycarbonylamino)ethyl]amino)acetic acid tert-butyl ester | 263254-52-0 | C47H48N8O8 | 852.947 |
Tris-(hydroxymethyl)phosphine oxide (THPO) to a certain extent resembles a part of 2′-deoxyribofuranose, although it exists in an acyclic form only and the oxygen atom at the THPO phosphorus center provides additional hydration site or acceptor of hydrogen bonds. After proper protection of hydroxyl groups, THPO was functionalized with nucleobases and converted into phosphoramidite monomers suitable for incorporation into growing oligonucleotide chains within the solid phase synthesis protocol. The resultant THPO-DNA analogs show reduced affinity to complementary DNA strands, and are resistant towards snake venom and calf spleen exonucleases.
IsoGNA, an isomer of glycerol nucleic acid GNA, is a flexible (acyclic) nucleic acid with bases directly attached to its linear backbone. IsoGNA exhibits (limited) base-pairing properties which are unique compared to other known flexible nucleic acids. Herein, we report on the details of the preparation of isoGNA phosphoramidites and an alternative route for the synthesis of the adenine derivative. The synthetic improvements described here enable an easy access to isoGNA and allows for the further exploration of this structural unit in oligonucleotide chemistry thereby spurring investigations of its usefulness and applicability.