1,3‐Dipolar Cycloadditions of Fulminic Acid

The synthesis and unimolecular decomposition of four novel Δ1-1,2,4-triazolines

“…Unfortunately those were also the products when the thermolyses were done in methyl acrylate or in dimethyl acetylenedicarboxylate (DMAD), two efficient dipolarophiles (8). Heterocycles 13 and 16 were identified on the basis of the spectroscopic data, which correspond well with those oi similar known aromatic heterocycles (Table 1) (12)(13)(14)(15)(16)(17)(18)(19)(20). A significant feature of the nrnr data is that the two methyl groups that are not part of the t-Bu substituent are magnetically equivalent, providing strong evidence that the 1,2,4-triazoline ring of 12 and 15 is not present in 13 and 16.…”

The Crystal and Molecular Structure of Mercury Fulminate (Knallquecksilber)

“…In 1824 Liebig and Gay-Lussac succeeded in analyzing silver fulminate as AgCNO [6] [11]. Berthelot [9] reported a very exact analysis of Hg(CNO) 2 and studied its explosive properties (Hg(CNO) 2 Ǟ Hg ϩ 2CO ϩ N 2 ).…”

Synthesis of 3‐Methoxy‐16α‐nitro‐14,17‐ethenoestra‐1,3,5(10)‐trien‐17β‐yl Acetate and Fragmentation‐Mediated Pathways to 14β,15β‐Fused N‐Heterocycles and 14β‐Functionalised Alkyl Derivatives

“…However, ni-trile 9 (Scheme 3) was obtained in about 50 % yield by the action of LDA on the oxazine 3, in accordance with similar observations for 3-unsubstituted isoxazolines and isoxazoles. [18,19] Other possible pathways to oxazine 3 were also considered, and in particular those in which Lewis acids might play a role in triggering the rearrangement of 2. Lewis acids are known to catalyse various reactions of nitroalkenes.…”