The author of 《Synthesis of some new heterocyclic compounds containing indole moiety》 were Sayed, Mostafa; El-Dean, Adel M. Kamal; Ahmed, Mostafa; Hassanien, Reda. And the article was published in European Chemical Bulletin in 2017. Electric Literature of C9H5ClN2 The author mentioned the following in the article:
3-Chloro-1H-indole-2-carbaldehyde was synthesized and converted into Schiff base derivatives I [R = H, EtCO2CH2; Ar = C6H5, 4-ClC6H4, 4-NO2C6H4 etc.] by condensation reaction with active methylene group containing compounds/hydrazine derivatives Compounds I were reacted with chloroacetyl chloride to gave 2-azetidinone derivatives II [R1 = H, CH2CO2Et, CH2C(O)NHNH2]. Furthermore reaction of synthesized azetidinone derivatives with hydrazine hydrate afforded N-carbohydrazide derivatives II [R1 = CH2C(O)NHNH2]. The experimental part of the paper was very detailed, including the reaction process of 3-Chloro-1H-indole-2-carbonitrile(cas: 74960-46-6Electric Literature of C9H5ClN2)
3-Chloro-1H-indole-2-carbonitrile(cas: 74960-46-6) is a member of organic chlorides. Organic chlorides are compounds containing a carbon-chlorine bond, which are widely used in the oil field as a wax dissolver. They are generally not present in crude oils and are typically the result of additives, cleaning solutions or chemicals used for oil recovery.Electric Literature of C9H5ClN2
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts