Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Patent
1999-02-17
2000-05-02
Ford, John M.
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
544219, 544223, C07D25110, C07D25112
Patent
active
060574445
ABSTRACT:
A process is described for the preparation of an aryl-1,3-5-triazine compound of formula (1). This process comprises reacting an aldehyde compound of formula (2) with biuret, compound of formula (3), in hydrochloric medium or with methyl sulfate (1.sup.st reaction step), then oxidizing the resulting compound of formula (4) to the compound of formula (5) or (6) (2.sup.nd reaction step) and subsequently chlorinating the compound so obtained to the compound of formula (1) (3.sup.rd reaction step) according to the following scheme: ##STR1## In the above scheme: R.sub.1 and R.sub.2 are each independently of the other hydrogen; hydroxy or C.sub.1 -C.sub.5 alkoxy. The compounds of formula (1) are used as UV absorbers or as starting products for the preparation of UV absorbers.
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Haase Jurg
Mossner Tanja
Balasubramanian V
Ciba Specialty Chemicals Corporation
Ford John M.
Mansfield Kevin T.
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