Tetrahedron Letters p. 5563 - 5566 (1997)
Update date:2022-08-04
Topics:
Coutts, Ian G.C.
Pavlidis, Vasilios H.
Reza, Khalid
Southcott, Mark R.
Wiley, Gregory
Oxidation of 4(2-hydroxyphenoxy)anilines 1b to 1d with active manganese dioxide leads directly to quinone mono-ketals 2b to 2d in reasonable yield. Similar reaction of 4 (2-sulfonamidophenoxy)anilines 9a, 9b provides an efficient synthesis spirobenzoxazolecyclohexadienones 10a and 10b but treatment with manganese dioxide of alcohol 3 and oxime 6 gives respectively azobenzene 4 and terphenyl 7 rather than spirodienones.
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Doi:10.1002/ardp.19973300504
(1997)Doi:10.1016/S0960-894X(99)00013-X
(1999)Doi:10.1016/S0040-4020(97)00667-4
(1997)Doi:10.1016/S0040-4039(97)21374-2
(1997)Doi:10.1039/b511259a
(2005)Doi:10.1021/jo970948k
(1997)
