Analyzing the synthesis route of 558-42-9

At the same time, in my other blogs, there are other synthetic methods of this type of compound,558-42-9, 1-Chloro-2-methyl-2-propanol, and friends who are interested can also refer to it.

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. 558-42-9, name is 1-Chloro-2-methyl-2-propanol. A new synthetic method of this compound is introduced below., 558-42-9

[0309] To a solution of 7-chloro-6-fluoro-lH-pyrazolo[4,3-b]pyridine (300 mg, 1.749 mmol) in DMF (5 mL) was added Cs2C03 (855 mg, 2.62 mmol) and 1 -chloro-2-methylpropan-2-ol (209 mg, 1.924 mmol) and the mixture was heated at 110 ¡ãC for 2 hours. Water (20 mL) was then added and the mixture was extracted with EtOAc (2 x 50 mL). The combined organic layers were dried over Na2S04, filtered, and evaporated to give l-(7-chloro-6-fluoro-2H- pyrazolo[4,3-b]pyridin-2-yl)-2-methylpropan-2-ol and l-(7-chloro-6-fluoro-lH- pyrazolo[4,3-b]pyridin-l-yl)-2-methylpropan-2-ol which were used i without further purification. MS [M+H] found 244.2.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,558-42-9, 1-Chloro-2-methyl-2-propanol, and friends who are interested can also refer to it.

Reference:
Patent; TAKEDA PHARMACEUTICAL COMPANY LIMITED; KWOK, Lily; LARSON, John David; SABAT, Mark; WO2011/146287; (2011); A1;,
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