{"id":5855,"date":"2021-08-13T03:58:56","date_gmt":"2021-08-12T19:58:56","guid":{"rendered":"https:\/\/www.pyrazoles-derivatives.com\/?p=5855"},"modified":"2021-08-13T03:58:56","modified_gmt":"2021-08-12T19:58:56","slug":"continuously-updated-synthesis-method-about-5-furan-2-yl-1h-pyrazol-3-amine","status":"publish","type":"post","link":"https:\/\/www.pyrazoles-derivatives.com\/?p=5855","title":{"rendered":"Continuously updated synthesis method about 5-(Furan-2-yl)-1H-pyrazol-3-amine"},"content":{"rendered":"

Reference of 96799-02-9<\/a>, These common heterocyclic compound, 96799-02-9, name is 5-(Furan-2-yl)-1H-pyrazol-3-amine, its 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.<\/p>\n

Example 21 To a solution of cyanuric chloride (230 mg, 1.25 mmol) in THF (16 mL) was added (S)- l-(4-fluorophenyl)ethylamine (0.16 mL, 1.25 mmol) and DIPEA (0. 20 mL, 1.25 mmol) at 0 C. The reaction mixture was let to stir at 0 C to room temperature for 2h. 3-amino- 5-(2-furyl)pyrazole (187 mg, 1.25 mmol) and DIPEA (0.20 mL, 1.25 mmol) were added to the above mixture and the resulting mixture was heated with microwave initiator at 150 C for 10 minutes. 1-methylpiperazine (0.28 mL, 2.50 mmol) and DIPEA (0.44 mL, 2.50 mmol) were added to the mixture and the mixture was heated with microwave initiator at 60 C for 10 minutes. Saturated NaHCO3 in water was added and the mixture was extracted by ethyl acetate (3 x 50 mL). The combined organic was washed by brine, dried over sodium sulfate and concentrated. The residue was chromatographed on a silica gel column eluted with 0-5 % MeOH\/DCM afforded 21 as light brown solid (52 mg, 9 %). 1H NMR (400 MHz, DMSO-d6,80C) delta 12.46 (bs, 1H, NH), 9.52 (bs, 1Eta, NH), 8.55 (bs, 1Eta, NH), 7.63-6.04 (m, 8Eta, Ar-H), 5.12 (bs, 1Eta, CH), 3.67 (bs, 4Eta, 2CH2), 2.30 (bs, 4Eta, 2CH2), 2.21 (s, 3Eta, CH3), 1.47 (s, 3Eta, CH3), 1.45 (s, 3Eta, CH3); ESI-MS: calcd for (C23Eta26FN9O) 463, found 464 [M+H]+. HPLC: retention time: 17.10 min. purity: 99%.<\/p>\n

The synthetic route of 96799-02-9 has been constantly updated, and we look forward to future research findings.<\/p>\n

Reference:
Patent; ABRAXIS BIOSCIENCE, LLC; TAO, Chunlin; WANG, Qinwei; HO, David; NALLAN, Laxman; POLAT, Tulay; SUN, Xiaowen; DESAI, Neil; WO2010\/144394; (2010); A1;<\/a>,
Pyrazole – Wikipedia<\/a>,
Pyrazoles – an overview | ScienceDirect Topics<\/p>\n","protected":false},"excerpt":{"rendered":"

The synthetic route of 96799-02-9 has been constantly updated, and we look forward to future research findings.<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[334,131],"tags":[126],"class_list":["post-5855","post","type-post","status-publish","format-standard","hentry","category-96799-02-9","category-pyrazoles-derivatives","tag-m-w100-200"],"yoast_head":"\nContinuously updated synthesis method about<\/title>\n<meta name=\"description\" content=\"Reference of 96799-02-9, These common heterocyclic compound, 96799-02-9, name is 5-(Furan-2-yl)-1H-pyrazol-3-amine, its 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.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.pyrazoles-derivatives.com\/?p=5855\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Continuously updated synthesis method about\" \/>\n<meta property=\"og:description\" content=\"Reference of 96799-02-9, These common heterocyclic compound, 96799-02-9, name is 5-(Furan-2-yl)-1H-pyrazol-3-amine, its 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.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.pyrazoles-derivatives.com\/?p=5855\" \/>\n<meta property=\"og:site_name\" content=\"pyrazoles-derivatives\" \/>\n<meta property=\"article:published_time\" content=\"2021-08-12T19:58:56+00:00\" \/>\n<meta name=\"author\" content=\"Jessica.F\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jessica.F\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.pyrazoles-derivatives.com\/?p=5855\",\"url\":\"https:\/\/www.pyrazoles-derivatives.com\/?p=5855\",\"name\":\"Continuously updated synthesis method about\",\"isPartOf\":{\"@id\":\"http:\/\/www.pyrazoles-derivatives.com\/#website\"},\"datePublished\":\"2021-08-12T19:58:56+00:00\",\"author\":{\"@id\":\"http:\/\/www.pyrazoles-derivatives.com\/#\/schema\/person\/d9a9f27bed675392c6f363a01ffd49f1\"},\"description\":\"Reference of 96799-02-9, These common heterocyclic compound, 96799-02-9, name is 5-(Furan-2-yl)-1H-pyrazol-3-amine, its 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.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.pyrazoles-derivatives.com\/?p=5855#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.pyrazoles-derivatives.com\/?p=5855\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.pyrazoles-derivatives.com\/?p=5855#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"http:\/\/www.pyrazoles-derivatives.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Continuously updated synthesis method about 5-(Furan-2-yl)-1H-pyrazol-3-amine\"}]},{\"@type\":\"WebSite\",\"@id\":\"http:\/\/www.pyrazoles-derivatives.com\/#website\",\"url\":\"http:\/\/www.pyrazoles-derivatives.com\/\",\"name\":\"pyrazoles-derivatives\",\"description\":\"Several pyrazole derivatives possess important pharmacological activities and they have been proved useful materials in drug research. 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