Tian‐Bao Huang, X. Qian, Z. Tao
Jul 6, 1999
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ChemInform
Abstract
In the presence of a strong Lewis base, such as Et3N, trithio-1,8-naphthalic anhydride (3) is easily oxidized. Two improved syntheses of trithio-1,8-naphthalic anhydride (3) are described. Trithio-1,8-naphthalic anhydride (3) undergoes Diels-Alder reactions with electron-deficient alkenes to give novel fused heterocyclic compounds (6–11) that then can undergo a novel, gradual desulfuration dimerization with triethyl phosphite to afford 12 and its analogs 13 and 14. The structures of 6–14 are confirmed by microanalysis, IR, and NMR spectroscopy, and MS. © 1999 John Wiley & Sons, Inc. Heteroatom Chem 10: 141–146, 1999