Benzene reacts with HCN via 1,4-cycloaddition and C2H2 loss to yield pyrimidine, which then forms purine with NH3 and HCN, as shown by quantum calculations and modeled for cold dry Mars conditions.
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Novel Chemical Pathways for the Formation of Nucleobase Precursors via Benzene {\pi}-Bond Addition to HCN
Benzene reacts with HCN via 1,4-cycloaddition and C2H2 loss to yield pyrimidine, which then forms purine with NH3 and HCN, as shown by quantum calculations and modeled for cold dry Mars conditions.