Vilsmeier-Haack Reaction
A. Vilsmeier and A. Haack, Ber.
60,119(1937)
Ferguson, Chem. Revs. 38,227(1946)
Bosshard, Zollinger, Helv. Chim. Acta 42, 1639(1959)
Maheas, Bull. Soc. Chim. France 1962,1989
G.A. Olah, S.J. Kuhn, Olah's Friedel-Crafts and Related Reactions
vol 3, Part 2 (New York,1964)
Jutz, Ber. 91,850(1958)
Schmitt et al., Bull. Soc. Chim. France 1964,2767
Burn et al.,Tetrahedron 21,1619(1965)