Process for preparing 6-alkoxy-(6H)-dibenzo[C,E][1,2]-oxaphosphorines

U.S. Patent Number: 5698729

Abstract: The invention relates to a process for preparing 6-alkoxy-(6H)-dibenzo[c,e][1,2]-oxaphosphorines of the formula (I) ##STR1## where R.sup.1 to R.sup.6 independently of one another are halogen, (C.sub.1 -C.sub.6)alkyl or (C.sub.1 -C.sub.6)alkoxy and R.sup.7 is (C.sub.1 -C.sub.8)alkyl, which comprises adding 6-halo-(6H)-dibenzo[c,e][1,2]-oxaphosphorines of the formula (II) ##STR2## where R.sup.1 to R.sup.6 have the meaning specified above and X is halogen, to alcohols R.sup.7 OH, where R.sup.7 has the meaning given above, at temperatures of -30.degree. to +5.degree. C. and then introducing ammonia at this temperature.

Inventors: Kleiner; Hans-Jerg (Kronberg, DE)

Assignee: Hoechst Aktiengesellschaft (Frankfurt, DE)

Application Number: 08/792,284

Issued: 1997-12-16

Expired: 2005-12-16

Classes: 558/82

Field of search: 558/82

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