{"id":6070,"date":"2021-08-27T03:37:33","date_gmt":"2021-08-26T19:37:33","guid":{"rendered":"https:\/\/www.pyrazoles-derivatives.com\/?p=6070"},"modified":"2021-08-27T03:37:33","modified_gmt":"2021-08-26T19:37:33","slug":"brief-introduction-of-tert-butyl-3-amino-66-dimethylpyrrolo34-cpyrazole-51h4h6h-carboxylate-2","status":"publish","type":"post","link":"https:\/\/www.pyrazoles-derivatives.com\/?p=6070","title":{"rendered":"Brief introduction of tert-Butyl 3-amino-6,6-dimethylpyrrolo[3,4-c]pyrazole-5(1H,4H,6H)-carboxylate"},"content":{"rendered":"

Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 398491-61-7, name is tert-Butyl 3-amino-6,6-dimethylpyrrolo[3,4-c]pyrazole-5(1H,4H,6H)-carboxylate, A new synthetic method of this compound is introduced below., category: pyrazoles-derivatives<\/a><\/p>\n

Example 1 : beta.beta-dimethyl-W-ttrans^-phenylcyclopropyll-S-tthienoES.Z-dlpyrimidin^-ylaminoJAbeta- dihydropyrrolo[3,4-c]pyrazole-5(1W)-carboxamide; .Preparation of Compound 1a: Lambda\/-(6,6-dimethyl-1,4,5,6-tetrahydropyrrolo[3,4-c]pyrazol-3- yl)thieno[3,2~d]pyrimidin-4-amine.; To a stirring solution of ferf-butyl 3-amino-6,6-dimethyl-4,6-dihydropyrrolo[3,4-c]pyrazole-5(1H)- carboxylate (0.62g, 2.46 mmol) in DMA (3mL) was added 4-chlorothieno[3,2-c\/]pyrimidine(0.44g, 1.05eq) and 4N HCI solution in 1,4-dioxane (0.65ml, 1.05eq). The resulting mixture was heated to 1400C for 0.5 EPO hours in microwave reactor. It was cooled to room temperature and the compound 1a was precipitated. Filtration and washing with CH2CI2 provided compound 1a as a yellow solid (0.48 g, 68% yield). Compound 1a was directly carried onto the next reaction without further purification. LCMS (API-ES, M+H+): 287.0. To a stirring mixture compound 1a(0.12g, 0.42mmol), and TEA (0.117ml, 2eq) in DMSO (1ml) and CH2CI2 (2ml) was added trans-2-phenylcyclopropyl isocyanate (0.068ml, 1.1eq). The resulting mixture was stirred at room temperature for 2h. The reaction mixture was purified by prep-HPLC to provide the title compound 1 as a white solid (0.019g, 10%). 1H NMR (CD3OD) delta: 1.06 (m, 1H), 1.11 (m, 1H), 1.68 (d, J=4.04 Hz, 6 H), 1.98 (m, 1 H), 2.69 (m, 1 H), 4.43 (s, 2 H), 7.01 – 7.07 (m, 3 H), 7.11 – 7.17 (m, 2 H), 7.34 (d, J=5.56 Hz, 1 H), 8.04 (d, J=5.31 Hz, 1 H), 8.59 (s, 1 H). Anal. (C23H23N7OS-CSHOACO-SH2O) C, H, N. HPLC: >95% purity.<\/p>\n

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.<\/p>\n

Reference:
Patent; PFIZER INC.; WO2006\/72831; (2006); A1;<\/a>,
Pyrazole – Wikipedia<\/a>,
Pyrazoles – an overview | ScienceDirect Topics<\/p>\n","protected":false},"excerpt":{"rendered":"

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[314,131],"tags":[127],"class_list":["post-6070","post","type-post","status-publish","format-standard","hentry","category-398491-61-7","category-pyrazoles-derivatives","tag-m-w200-300"],"yoast_head":"\nBrief introduction of<\/title>\n<meta name=\"description\" content=\"Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. 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