61679-83-2Relevant academic research and scientific papers
5-Methylcytosine is Oxidized to the Natural Metabolites of TET Enzymes by a Biomimetic Iron(IV)-Oxo Complex
Jonasson, Niko S. W.,Daumann, Lena J.
supporting information, p. 12091 - 12097 (2019/08/07)
Ten-eleven-translocation (TET) methyl cytosine dioxygenases play a key role in epigenetics by oxidizing the epigenetic marker 5-methyl cytosine (5mC) to 5-hydroxymethyl cytosine (5hmC), 5-formyl cytosine (5fC), and 5-carboxy cytosine (5cC). Although much of the metabolism of 5mC has been studied closely, certain aspects—such as discrepancies among the observed catalytic activity of TET enzymes and calculated bond dissociation energies of the different cytosine substrates—remain elusive. Here, it is reported that the DNA base 5mC is oxidized to 5hmC, 5fC, and 5cC by a biomimetic iron(IV)-oxo complex, reminiscent of the activity of TET enzymes. Studies show that 5hmC is preferentially turned over compared with 5mC and 5fC and that this is in line with the calculated bond dissociation energies. The optimized syntheses of d3-5mC and d2-5hmC are also reported and in the reaction with the biomimetic iron(IV)-oxo complex these deuterated substrates showed large kinetic isotope effects, confirming the hydrogen abstraction as the rate-limiting step. Taken together, these results shed light on the intrinsic reactivity of the C?H bonds of epigenetic markers and the contribution of the second coordination sphere in TET enzymes.
A method for synthesis of cytosine
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Paragraph 0058; 0059, (2017/03/22)
The invention discloses a synthesis method of cytosine. According to the method, ethyl cyanoacetate, urea and triethyl orthoformate are utilized as raw materials, ethyl 3-cyano-2-ureido-acrylate, 5-ethoxycarbonyl cytosine, and 5-carboxyl cytosine are sequentially synthesized, decarboxylation is performed to synthesize cytosine and refining, correction, perfection and other various process steps are sequentially performed. Therefore, the yield of the synthesis method is high, the highest total yield can achieve 75.14%, the comprehensive benefits are finally improved and the method has the advantages of simplicity in operation, small difficulty in actual production and convenience in large-scale application.
Syntheses with Nitriles, XCV: Deamination of Cytosine Derivatives
Deshmukh, M.,Mittelbach, M.,Junek, H.
, p. 91 - 98 (2007/10/02)
Treatment of 2-formyl-3-dimethylamino-propenenitrile (1a) and 2-ethoxycarbonyl-3-dimethylamino-propenenitrile (1b), resp., with substituted ureas led to the 2-cyano-3-ureidoacrylates 2, which can be cyclized under alkaline conditions to give 5-formyl-5-cy
