2-Metallation can be effected in a one-pot sequence via the Li carbamate: J. Chem. Soc., Perkin 1, 17 (1989); cf Indole. 1,2,3,4-Tetrahydroquinoline derivatives are oxidized to N-hydroxy lactams by H2O2 in the presence of tungstate ion: J. Org. Chem., 55, 1744 (1990).