Method for preparation of boratabenzene derivatives
CA 2431962 A1 · Owner: Equistar Chemicals, Lp · Inventors: Etherton, Bradley P.; Cribbs, Leonard V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing boratabenzene derivatives is provided. The process includes the hydrogenation of a compound containing a boranaphthalene functional group to form a boratabenzene-containing compound. Depending on the compound containing a boranaphthalene functional group the resulting , boratabenzene compound may be converted into a catalyst suitable for olefin polymerization. A process for forming a boratabenzene derivative from a halodioxaborolane is also provided. In this process a halo-dioxaborolane is , reacted with a piperylide salt for form a pentadienyl dioxaborolane. The pentadienyl-dioxaborolane is reacted with a strong base to form an intermediate …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed January 8, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 8, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 8, 2024.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.