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- W2949161691 abstract "Abstract 5′-O-MMTr-cytosine arabinoside was prepared on a large scale from 5′-O-MMTr-cytidine with diphenyl carbonate via 5′-protected cytidine-2′,3′-carbonate-aracytidine-2′,2-anhydro derivative at a 67 % yield. The synthesis of 1,2-L-dipalmitoyl-snglycerol, 1,2-L-distearoyl-sn-glycerol and 1,2-L-dioleoyl-sn-glycerol described here using 9-fluorenylmethoxycarbonyl (FMOC) group for protection of 3-position of glycerol which can be selectively removed by Et3N treatment on the overall 60–70 % yield based on 1.2,-isopropilidene-sn-glycerol. These glycerols were phosphorylated first with 2-chlorophenyl-phosphoro-bis-triazolide quantitatively1 in order to avoid acyl migration, then the glycerophosphate intermediates were condensed with 2′,3′,N4-trileulinyl-l-β-D-arabinofuranosylcytosine in the presence of 2-mesytilenesulphonyl chloride (MsCl) and 1 -methylimidazole (Melm)-which was used in the coupling of nucleotides2-− in an 85–95 % yield compared with the low yielding diester method of Ryu3. Deblocking was carried out in two steps with tetrabutylammonium fluoride (TBAF) and hydrazine hydrate, producing target compouns (14a, 14b, 14c) at a 50 % yield." @default.
- W2949161691 created "2019-06-27" @default.
- W2949161691 creator A5015632405 @default.
- W2949161691 date "1998-09-01" @default.
- W2949161691 modified "2023-10-17" @default.
- W2949161691 title "An Improved Synthesis of 1-β-D-Arabinofuranosylcytosine 5′-Phosphate-L-1,2-diacylglycerols" @default.
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- W2949161691 doi "https://doi.org/10.1080/07328319808004734" @default.
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