{"id":6388,"date":"2021-09-17T03:39:50","date_gmt":"2021-09-16T19:39:50","guid":{"rendered":"https:\/\/www.pyrazoles-derivatives.com\/?p=6388"},"modified":"2021-09-17T03:39:50","modified_gmt":"2021-09-16T19:39:50","slug":"9-17-2021-news-the-important-role-of-25016-11-9","status":"publish","type":"post","link":"https:\/\/www.pyrazoles-derivatives.com\/?p=6388","title":{"rendered":"9\/17\/2021 News The important role of 25016-11-9"},"content":{"rendered":"

Some common heterocyclic compound, 25016-11-9, name is 1-Methyl-1H-pyrazole-4-carbaldehyde, molecular formula is C5H6N2O, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route. COA of Formula: C5H6N2O<\/a><\/p>\n

Preparation 65: 3 ‘-Chloro-4-( 1 -methyl- 1 H-pyrazol-4-ylmethyl)-3 ,4,5 ,6-tetrahydro-2H- [l,2′]bipyrazineDissolve 3′-chloro-3,4,5,6-tetrahydro-2H-[l,2’]bipyrazinyl (3.43 g, 17.3 mmol) in tetrahydrofuran (100 mL). Add 1 -methyl- lH-pyrazole-4-carbaldehyde (2.244 g, 20.38 mmol) in dry tetrahydrofuran (5 mL), stir for 10 min. at room temperature, add sodium triacetoxyborohydride (4.32 g, 20.4 mmol) and subject the reaction to ultrasound stirring for 6 hr. at room temperature. Add saturated aqueous sodium hydrogen carbonate (100 mL) then 2 N sodium hydroxide (10 mL) to the mixture and extract with DCM (2 x 200 mL). Pass the combined DCM extracts through an 1ST Phase Separator Frit, concentrate and purify (silica gel chromatography, eluting with 0: 100 to 8:92 methanol:DCM), to give the title preparation as a crystalline solid (5.21 g, 92%). MS (ES): m\/z = 293.1 [M+H]+.<\/p>\n

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 25016-11-9, its application will become more common.<\/p>\n

Reference:
Patent; ELI LILLY AND COMPANY; WO2008\/141020; (2008); A1;<\/a>,
Pyrazole – Wikipedia<\/a>,
Pyrazoles – an overview | ScienceDirect Topics<\/p>\n","protected":false},"excerpt":{"rendered":"

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 25016-11-9, its application will become more common.<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[151,131],"tags":[126],"class_list":["post-6388","post","type-post","status-publish","format-standard","hentry","category-25016-11-9","category-pyrazoles-derivatives","tag-m-w100-200"],"yoast_head":"\nThe important role of<\/title>\n<meta name=\"description\" content=\"Some common heterocyclic compound, 25016-11-9, name is 1-Methyl-1H-pyrazole-4-carbaldehyde, molecular formula is C5H6N2O, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route. 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