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ChemicalBook CAS DataBase List 2H-Pyran-4-carboxylicacid,tetrahydro-,hydrazide(9CI)

2H-Pyran-4-carboxylicacid,tetrahydro-,hydrazide(9CI) synthesis

2synthesis methods
-

Yield:59293-18-4 98%

Reaction Conditions:

with hydrazine monohydrate in methanol at 20;Reflux;Inert atmosphere;

Steps:

241 oxane-4-carbohydrazide

To a stirred solution of methyl tetrahydro-2H-pyran-4-carboxylate (4 g, 27.75 mmol) in MeOH (50 mL) at RT, hydrazine monohydrate (10.8 mL, 222 mmol) was added portion-wise and the resulting reaction mixture was stirred at reflux O/N. The mixture was allowed to reach RT and concentrated under vacuum affording the title compound oxane-4-carbohydrazide (p241 , 3.9 g, y= 98%) as white solid. MS (/T7/z): 145.1 [MH]+.

References:

WO2016/67043,2016,A1 Location in patent:Page/Page column 154

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