3,3-Diaryl-3H-2,1-benzoxathiole 1-oxides: new sultine colour-formers for carbonless imaging
作者:Alan R. Katritzky、Zhongxing Zhang、Hengyuan Lang、Nusrallah Jubran、Louis M. Leichter、Norman Sweeny
DOI:10.1039/a608290d
日期:——
Lithiations ofN-phenylbenzenesulfinamides followed by
treatment with Michler’s ketone and subsequent cyclizations during
acidic workup provide 3,3-diaryl-3H-2,1-benzoxathiole 1-oxides in
reasonable to good yields. The title compounds 11a, c–e, h
develop dark-blue colours in acidic media.