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US2025179081A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2025179081-A1 |
| Application number | US-202419000007-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 23, 2024 |
| Priority date | May 27, 2019 |
| Publication date | Jun 5, 2025 |
| Grant date | — |
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Abstract
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A method to prepare a compound of formula (1), or a salt thereof is provided:wherein R1 to R4 are each independently an alkyl group.
First claim
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1 . A method to prepare a compound of formula (1), or a salt thereof, comprising: providing a compound represented by formula (A); reacting the compound of formula (A) with a hydrogen source and a catalyst comprising platinum, to obtain a compound of formula (2); and N-alkylating the compound of formula (2) with an alkylation reagent, wherein R 1 to R 4 are each independently an alkyl group. 2 . The method according to claim 1 , wherein the catalyst further comprises vanadium. 3 . The method according to claim 1 , wherein the catalyst further comprises a carrier selected from the group of inorganic oxides consisting of silica, titania, zirconia, alumina, magnesium oxide, tricalcium phosphate, and any composite of two or more thereof. 4 . The method according to claim 2 , wherein the catalyst further comprises a carrier selected from the group of inorganic oxides consisting of silica, titania, zirconia, alumina, magnesium oxide, tricalcium phosphate, and any composite of two or more thereof. 5 . The method according to claim 1 , wherein the catalyst further comprises tricalcium phosphate. 6 . The method according to claim 2 , wherein the catalyst further comprises tricalcium phosphate.
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using at least one organic template directing agent · CPC title
Other general methods · CPC title
- C07D487/04Primary
Ortho-condensed systems · CPC title
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Frequently asked questions
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- What does patent US2025179081A1 cover?
- A method to prepare a compound of formula (1), or a salt thereof is provided:wherein R1 to R4 are each independently an alkyl group.
- Who is the assignee on this patent?
- Univ Osaka, N E Chemcat Corp
- What technology area does this patent fall under?
- Primary CPC classification C07D487/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Jun 05 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).