28128-28-1Relevant academic research and scientific papers
8-Chloroadenosine 3', 5'-cyclic monophosphate preparations
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, (2008/06/13)
The compound 8-Chloroadenosine 3',5'-cyclic phosphate is used to treat malignant tumors in warm blooded animals. Two novel single step syntheses of 8-chloroadenosine 3',5'-cyclic phosphate and other related adenine and adenosine compounds from corresponding adenosine 3', 5'-cyclic phosphate and other respective related adenosine compounds are disclosed.
The behaviour of 6- and 8-substituted purines toward potassium amide in liquid ammonia. A new example of tele-amination
Kos, N. J.,Plas, H. C. van der,Veldhuizen, A. van
, p. 267 - 270 (2007/10/02)
Reaction of 6-chloro- and 6-(methylthio)purine with potassium amide in liquid ammonia leads to the formation of adenine.When these aminations are carried out with 15N-labelled potassium amide, the 15N label is found to be present in the amino group, proving that these reactions do not involve opening of the pyrimidine ring.Low temperature 1H- and 13C-NMR spectroscopy of solutions of 6-chloro- and 6-(methylthio)purine in liquid ammonia, containing potassium amide give no evidence for the presence of an intermediary ?-adduct. 8-Chloro- and 8-(methylthio)purine undergo a Tschitschibabin amination at position 6 leading to 8-chloro- an d 8-(methylthio)adenine.In addition 8-chloropurine gives adenine.Evidence is presented that the formation of this product proceeds via a tele-amination. 6-tert-Butyl-8-(methylthio)purine and 8-aminopurine are found to be unreactive towards potassium amide.
