... Soc., Perkin Trans. 1, 1997 1229 Novel synthesis of 10-membered cyclic bis-ethers from 4-(N-alkylanilino)but-2-yn-1-ols1 Krishna C. Majumdar,* Gour H. Jana and Udayan Das Department of Chemistry, University of Kalyani, Kalyani 741 235, West Bengal, India ... Soc., Chem. Commun., 1969, 294; (c) JE Baldwin, JE Brown and G. Hofle, J. Am. Chem. ... Soc., Perkin Trans. 1, 1989, 1285; KC Majumdar and SK Ghosh, J. Chem. Soc., Perkin Trans. 1, 1994, 2889. ...