Preparation of twelve 1-methyl-2-formyl-5-substituted pyrroles and their hydrazones was written by He, Hai-Ying;Jiang, Xi-Kui. And the article was included in Chinese Journal of Chemistry in 1999.Formula: C7H6N2O The following contents are mentioned in the article:
Preparation of twelve 1-methyl-2-formyl-5-substituted pyrroles I (Y = H, NO2, CO2Me, etc.), with five of them as new compounds, is described. Their derivatives, i. e., 1-methyl-2-formyl-5-substituted pyrrole Ph hydrazones II (R = H) and 1-methyl-2-formyl-5-substituted pyrrole (4-nitrophenyl) hydrazones II ( R = NO2) are all new compounds They have also been prepared and further identified. This study involved multiple reactions and reactants, such as 5-Formyl-1-methyl-1H-pyrrole-2-carbonitrile (cas: 81698-03-5Formula: C7H6N2O).
5-Formyl-1-methyl-1H-pyrrole-2-carbonitrile (cas: 81698-03-5) belongs to nitriles. The R-C-N bond angle in and nitrile is 180° which give a nitrile functional group a linear shape. Both the carbon and the nitrogen are sp hydridized which leaves them both with two p orbitals which overlap to form the two π bond in the triple bond. Industrially, the main methods for producing nitriles are ammoxidation and hydrocyanation. Both routes are green in the sense that they do not generate stoichiometric amounts of salts.Formula: C7H6N2O
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts