METHOD FOR PRODUCING 5-NORBORNENE-2-SPIRO-ALPHA-CYCLOALKANONE- ALPHA'-SPIRO-2''-5''-NORBORNENE
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United States of America Patent
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Dec 1, 2016
app pub date -
Jan 9, 2015
filing date -
Jan 20, 2014
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A method for producing a 5-norbornene-2-spiro-α-cycloalkanone-α′-spiro-2″-5″-norbornene, comprising: a first step of forming a specific Mannich base by reacting a specific carbonyl compound and a specific amine compound with each other in an acidic solvent comprising a formaldehyde derivative and an acid represented by a formula: HX (in the formula, X represents F or the like), to thereby obtain a reaction liquid comprising the Mannich base in the acidic solvent; and a second step of reacting the Mannich base and a specific diene compound with each other by adding an organic solvent, a base in an amount of 1.0 to 20.0 mole equivalents to the acid, and the diene compound to the reaction liquid, and then heating the reaction liquid, to thereby form a specific 5-norbornene-2-spiro-α-cycloalkanone-α′-spiro-2″-5″-norbornene, wherein a content of the acid in the acidic solvent used in the first step is 0.01 to 0.075 mole equivalents to the ketone group of the carbonyl compound.
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