464. The preparation of some substituted pyridine 1-oxides
作者:A. R. Katritzky
DOI:10.1039/jr9560002404
日期:——
Notes: Some Reactions of 1-Methoxypyridinium Salts and a Color Test for N-Oxides
作者:N Coats、A Katritzky
DOI:10.1021/jo01093a637
日期:1959.11
2-Pyridylphosphonates: a new type of modification for nucleotide analogues
作者:Tommy Johansson、Annika Kers、Jacek Stawinski
DOI:10.1016/s0040-4039(01)00115-0
日期:2001.3
Suitably protected dithymidine H-phosphonates afforded the corresponding dinucleoside 2-pyridylphosphonates upon treatment with N-methoxypyridinium tosylate in acetonitrile in the presence of 1,8-diazabicylo[5.4.0]undec-7-ene (DBU). The reaction was rapid (ca. 5 min), practically quantitative and proceeded stereospecifically, most likely with retention of configuration at the phosphorus centre. (C) 2001 Elsevier Science Ltd. All rights reserved.
Nucleoside H-phosphonates. Part 19: Efficient entry to novel nucleotide analogues with 2-pyridyl- and 4-pyridylphosphonothioate internucleotide linkages
作者:Tommy Johansson、Jacek Stawinski
DOI:10.1016/j.tet.2003.11.010
日期:2004.1
Synthetic and P-31 NMR spectroscopy studies resulted in the development of efficient protocols for the stereospecific synthesis of a novel type of nucleotide analogues, 2-pyridyl- and 4-pyridylphosphonothioates. The underlying chemistry involves formation of the P-C bond via a base-promoted reaction of suitably protected dithymidine H-phosphonothioates with N-methoxypyridinium tosylate in acetonitrile, or with trityl chloride in pyridine, to produce high yields of nucleotide analogues with a 2-pyridyl- or 4-pyridyl moiety directly bound to the phosphorus centre. (C) 2003 Elsevier Ltd. All rights reserved.