Reddy, P.A. & Rao, G.S.K. Proc. Indian Acad. Sci. (Chem. Sci.) (1980) 89: 435. doi:10.1007/BF02881057
Vilsmeier reaction on a few representative 6- and 7-methoxy-1- and 2-tetralones has been investigated. While 1-tetralones give the corresponding 1-chloro-2-formyl-3,4-dihydronaphthalenes, the 2-tetralones afford 1,3-bisformyl-2-chloronaphthalenes. Spectral characteristics of all the products obtained are given and a mechanistic proposal has been made to explain the observed chlorobisformylation.
Vilsmeier reaction 1- and 2-tetralones chlorobisformylnaphthalenes synthesis and mechanism