Acetic Anhydride → 2-Hexen-1-ol, 3-methyl-, 1-acetate

온도

100 °C

3-methylhex-2-enal (as a 40/60 Z/E isomers mixture) (112 g, 1 mol.), acetic anhydride (107 g, 1.05 mol) and (ethylenediamine)[1,2-bis(diphenylphosphino) ethane]ruthenium(bispivalate) (76 mg, 0.1 mmol, 0.01 mol.%) were loaded altogether in a 300 ml autoclave equipped with a mechanical stirring device. Sealed autoclave was then purged to under stirring with nitrogen (3 times 5 bars) and hydrogen (3 times 5 bars) before being pressurized to 50 bars hydrogen. It was then heated to 100° C. and hydrogen pressure was maintained to 50 bars during all the reaction to afford desired product with 96% selectivity as a 40/60 WE isomers mixture. Upon reaction completion (checked by both hydrogen consumption and GC), autoclave was then cooled down to 25° C. It was then depressurized and purged with nitrogen (3 times 5 bars) and reaction mixture was then transferred to a round-bottomed flask and concentrated under vacuum. After initial flash distillation followed by further fractional distillation, pure 3-methylhex-2-en-1-yl acetate was obtained in 90% yield.

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ORD 기록

ord-c964ea2f411e4d90b25b689a4fb7d5eb

출처 데이터셋

uspto-grants-2015_07

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US09090534B2