BISAZOMETHINE METAL COMPLEX COLOURANTS OF HYDROXY-COUMARIN DERIVATIVES OR HYDROXY-CHROMONE DERIVATIVES AND PROCESS FOR THEIR MANUFACTURE

摘要

1513168 4 - Hydroxy - 3 - N - phenylaldininecoumarin CIBA-GEIGY AG 30 July 1975 [31 July 1974] 31810/75 Heading C2C [Also in Division C4] In Example 1 4-hydroxy-3-N-phenylaldinine coumarin having the formula wherein Y 1 and Y 2 are hydrogen and R is phenyl, is obtained by reacting H-hydroxycoumarin, orthoformic acid triethyl ester and aniline in ethylene glycol at 180‹ C.