... (b) See also D. S. Breslow and H. Skolnik in “The Chemistry of Heterocyclic Compounds, Multisulfur and Sulfur and Oxygen Five and Six-Membered Heterocycles”, Wiley-Interscience, London, 1966, Part 2, p 1155. ... 89,43440 (1978). (d) “Organic Syntheses”, Collect. Vol. ... J. Org. ...