Dibenzothiophene-Containing Materials in Phosphorescent Light Emitting Diodes
US-2016372685-A1 · Dec 22, 2016 · US
Process for manufacture of telmisartan
US8993778B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8993778-B2 |
| Application number | US-201313750551-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 25, 2013 |
| Priority date | Mar 31, 2003 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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A process for preparing telmisartan by reacting 2-n-propyl-4-methyl-6-(1′-methylbenzimidazol-2′-yl)benzimidazole with a compound of formula (IV) wherein Z is a leaving group, to obtain the compound 2-cyano-4′-[2″-n-propyl-4″-methyl-6″-(1′″-methylbenzimidazol-2′″-yl)benzimidazol-1″-ylmethyl]biphenyl, and subsequently hydrolyzing the nitrile function to obtain the acid function.
First claim
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We claim: 1. A process for preparing telmisartan, comprising: (a) reacting 2-n-propyl-4-methyl-6-(1′-methylbenzimidazol-2′-yl)benzimidazole (I): with a compound of formula (IV): wherein Z is a leaving group, in a first solvent selected from methylene chloride…
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Human Necessities · mapped topic
Human Necessities · mapped topic
- C07D235/20Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- C07D403/04Primary
Chemistry & Metallurgy · mapped topic
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- What does patent US8993778B2 cover?
- A process for preparing telmisartan by reacting 2-n-propyl-4-methyl-6-(1′-methylbenzimidazol-2′-yl)benzimidazole with a compound of formula (IV) wherein Z is a leaving group, to obtain the compound 2-cyano-4′-[2″-n-propyl-4″-methyl-6″-(1′″-methylbenzimidazol-2′″-yl)benzimidazol-1″-ylmethyl]biphenyl, and subsequently hydrolyzing the nitrile function to obtain the acid …
- Who is the assignee on this patent?
- Hauel Norbert, Dach Rolf, Heitger Helmut, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification C07D235/20. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).