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H. S. Mosher, Heterocyclic Compounds 1, 405 (1950); A. F. Pozharskii et al., Russ. Chem. Rev. 47, 1042 (1978); H. J. W. van den Haak et al., J. Org. Chem. 46, 2134 (1981). Applications: N. J. Kos et al., ibid. 44, 3140 (1979); H. Tondys et al., J. Heterocyclic Chem. 22, 353 (1985); E. Ciganek et al., J. Org. Chem. 57, 4521 (1992). Review: H. C. van der Plas, M. Wozniak, Croat. Chem. Acta 59, 33-49 (1986). Cf.

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