Calcium Carbide: From Elemental Carbon to <scp>Isotope‐Economic</scp> Synthesis of <scp><sup>13</sup>C<sub>2</sub>‐Labeled</scp> Heterocycles<sup>†</sup>
作者:Maria S. Ledovskaya、Vladimir V. Voronin、Nikita R. Valov、Dmitriy E. Samoylenko
DOI:10.1002/cjoc.202300261
日期:2023.11
generation of 13C2-acetylene in 1,3-dipolar cycloaddition and [4+2] cycloaddition reaction. For the first time, 1H-1,2,3-triazoles-4,5-13C2 and isoxazoles-4,5-13C2 were synthesized using calcium carbide-13C2. A Diels-Alder type cycloaddition of 3,6-di(pyridin-2-yl)-1,2,4,5-tetrazine and Ca13C2 was investigated, and the best way for the synthesis of 3,6-di(pyridin-2-yl)pyridazine-4,5-13C2 was proposed
13 C-碳是最容易获得的碳-13 来源。它是一种相对便宜的固体材料,可以很容易地转化为碳化钙- 13 C 2。在目前的工作中,Ca 13 C 2用于在1,3-偶极环加成和[4+2]环加成反应中原位生成13 C 2 -乙炔。首次利用电石- 13 C 2 合成了1 H -1,2,3-三唑-4,5- 13 C 2和异恶唑-4,5- 13 C 2。研究了3,6-二(吡啶-2-基)-1,2,4,5-四嗪与Ca 13 C 2的Diels-Alder型环加成反应,找到了合成3,6-二(吡啶-2-基)-1,2,4,5-四嗪的Diels-Alder型环加成反应。首次提出(吡啶-2-基)哒嗪-4,5- 13 C 2 。在这里,我们对13 C 2标记的三唑、异恶唑和3,6-二(吡啶-2-基)哒嗪的NMR谱进行详细描述。