Maryasov, M. A. team published research in Russian Journal of General Chemistry in 2020 | 105-34-0

Product Details of C4H5NO2, Methyl cyanoacetate is an alkyl cyanoacetate ester.
Methyl cyanoacetate is the intermediate product in pharmaceutical organic synthesis as well as in the synthesis of some biologically active compounds used in agriculture. It undergoes calcite or fluorite catalyzed Knövenagel condensation with aromatic aldehydes, giving the corresponding arylidenemalononitriles and (E)-α -cyanocinnamic esters.
Methyl Cyanoacetate is often used as a nucleophile in the electrochemical oxidation of catechols. Methyl Cyanoacetate is also a reagent in the synthesis of Methyl 2-Amino-4-trifluoromethylthiophene-3-carboxylate (M287290); a compound used in the synthesis of DPP-IV inhibitors for treating type 2 diabetes., 105-34-0.

Inorganic compounds containing the −C≡N group are not called nitriles, but cyanides instead.105-34-0, formula is C4H5NO2, Name is Methyl 2-cyanoacetate. Though both nitriles and cyanides can be derived from cyanide salts, most nitriles are not nearly as toxic. Product Details of C4H5NO2.

Maryasov, M. A.;Davydova, V. V.;Nasakin, O. E.;Shteingolts, S. A.;Lodochnikova, O. A. research published 《 Synthesis of Aminophenylpolycarbonitriles from Arylidenemalononitriles by the Michael Reaction》, the research content is summarized as follows. The reactions of arylidenemalononitriles RCH=C(CN)CN (R = H, Ph, 4-methoxyphenyl, 4-hydroxyphenyl, 4-nitrophenyl) with malononitrile, Me cyanoacetate and cyanoacetamide yielded aminophenyldi- and tricarbonitriles I (R1 = CN, CONH2, COOMe). Formation of these compounds I occurs through the dehydrocyanation step of the corresponding aminohexenepolycarbonitriles II.

Product Details of C4H5NO2, Methyl cyanoacetate is an alkyl cyanoacetate ester.
Methyl cyanoacetate is the intermediate product in pharmaceutical organic synthesis as well as in the synthesis of some biologically active compounds used in agriculture. It undergoes calcite or fluorite catalyzed Knövenagel condensation with aromatic aldehydes, giving the corresponding arylidenemalononitriles and (E)-α -cyanocinnamic esters.
Methyl Cyanoacetate is often used as a nucleophile in the electrochemical oxidation of catechols. Methyl Cyanoacetate is also a reagent in the synthesis of Methyl 2-Amino-4-trifluoromethylthiophene-3-carboxylate (M287290); a compound used in the synthesis of DPP-IV inhibitors for treating type 2 diabetes., 105-34-0.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts