Kalugin, Victor E. published the artcileA convenient synthesis of benzofuro[3,2-c]isoquinolines and naphtho[1′,2′:4,5]furo[3,2-c]isoquinolines, Product Details of C8H6ClN, the publication is Tetrahedron Letters (2011), 52(14), 1557-1560, database is CAplus.
A convenient method for the preparation of benzofuro[3,2-c]isoquinoline derivatives is described. The condensation reaction of Me 2-(chloromethyl)benzoate with substituted salicylonitriles (I) and intramol. cyclization of the resulting substituted Me 2-[(2-cyanobenzyl)oxy]benzoates using potassium tert-butoxide results in substituted benzofuro[3,2-c]isoquinolin-5(6H)-ones. The same sequence of reactions starting from 2-(chloromethyl)benzonitrile and I gave substituted 5-aminobenzofuro[3,2-c]isoquinolines. In addition, this method is useful for the synthesis of other heterocycles. For example, using 1-cyano-2-naphthol, instead of I, gives naphtho[1′,2′:4,5]furo[3,2-c]isoquinolines.
Tetrahedron Letters published new progress about 612-13-5. 612-13-5 belongs to nitriles-buliding-blocks, auxiliary class Organic Pigment, name is 2-(Chloromethyl)benzonitrile, and the molecular formula is C8H6ClN, Product Details of C8H6ClN.
Referemce:
https://en.wikipedia.org/wiki/Nitrile,
Nitriles – Chemistry LibreTexts