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Purines. XI. The Synthesis of N-Alkoxyadenosines and Their 2', 3'-O-Isopropylidene Derivatives
Purines. XI. The Synthesis of N-Alkoxyadenosines and Their 2', 3'-O-Isopropylidene Derivatives
- Source :
- Chemical and Pharmaceutical Bulletin. 21:1676-1682
- Publication Year :
- 1973
- Publisher :
- Pharmaceutical Society of Japan, 1973.
-
Abstract
- Alkylation of adenosine 1-oxide (I) and its 2', 3'-O-isopropylidene derivative (V) with alkyl halides in N, N-dimethylacetamide furnished the corresponding 1-alkoxy derivatives (IIa-f). The free bases, obtained from IIa-f, readily underwent rearrangement to give the isomeric N6-alkoxy derivatives (IVa-f) when heated in water. Treatment of 1-benzyloxyadenosine perchlorate (IIc : X=ClO4) with water at pH 9.5 and 39-41°for 4 hr afforded the ring-opened intermediate (IIIc)(79% yield), which was recyclized in hot water (pH 7) to IVc. In alternative synthesis of IVa, b, c, condensation of 6-chloro-6-β-D-ribofuranosylpurine (VIa) with the appropriate alkoxyamines proceeded smoothly. Removal of the isopropylidene group from IVe under acid conditions or exchange amination of adenosine with ethoxyamine at pH 5 also yielded N-ethoxyadenosine (IVb).
Details
- ISSN :
- 13475223 and 00092363
- Volume :
- 21
- Database :
- OpenAIRE
- Journal :
- Chemical and Pharmaceutical Bulletin
- Accession number :
- edsair.doi...........4c9646238fab9f15f7469142d2df9649
- Full Text :
- https://doi.org/10.1248/cpb.21.1676