{"id":863,"date":"2011-01-24T16:49:00","date_gmt":"2011-01-24T16:49:00","guid":{"rendered":"https:\/\/psiconautica.org\/wordpress\/?p=863"},"modified":"2022-02-08T19:21:43","modified_gmt":"2022-02-08T19:21:43","slug":"dehydrogenation-of-14-butanediol-14-bd-to-gamma-butyrolactone-gbl","status":"publish","type":"post","link":"https:\/\/psiconautica.org\/wordpress\/quimica-avanzada\/dehydrogenation-of-14-butanediol-14-bd-to-gamma-butyrolactone-gbl\/","title":{"rendered":"Dehydrogenation of 1,4-Butanediol (1,4-BD) to gamma-Butyrolactone (GBL)"},"content":{"rendered":"
\n

Dehydrogenation of 1,4-Butanediol (1,4-BD) to gamma-Butyrolactone (GBL)<\/h2>\n
\n

A mixture of 90.1g (1 mole) 1,4-butanediol, 4g of copper chromite catalyst<\/a> and 0.15g of powdered reagent grade sodium hydroxide (or better KOH) was stirred vigorously and heated under reflux. At about 200\u00b0C, a lively evolution of hydrogen occurred, and the temperature dropped about 10\u00b0C and the dehydrogenation proceeded smoothly. The evolution of gas (39L\/2mol per mole 1,4-butanediol reacted) ceased in about 3h. The reaction mixture was cooled to room temperature, filtered from the catalyst and distilled under reduced pressure to give gamma-butyrolactone in about 80% yield and unreacted 1,4-butanediol in about 10% yield.<\/p>\n

Other references for the transformation of 1,4-Butanediol to gamma-Butyrolactone<\/a><\/p>\n

\n

<\/a><\/p>\n

References<\/h3>\n

[1]<\/b> JACS 68, 1385 (1946)<\/p>\n

\n","protected":false},"excerpt":{"rendered":"

Dehydrogenation of 1,4-Butanediol (1,4-BD) to gamma-Butyrolactone (GBL) A mixture of 90.1g (1 mole) 1,4-butanediol, 4g of copper chromite catalyst and 0.15g of powdered reagent grade sodium hydroxide (or better KOH) was stirred vigorously and heated under reflux. At about 200\u00b0C, a lively evolution of hydrogen occurred, and the temperature dropped about 10\u00b0C and the dehydrogenation […]<\/p>\n","protected":false},"author":1,"featured_media":1615,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-863","post","type-post","status-publish","format-standard","has-post-thumbnail","category-quimica-avanzada"],"yoast_head":"\nDehydrogenation of 1,4-Butanediol (1,4-BD) to gamma-Butyrolactone (GBL) - Psicon\u00e1utica<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dehydrogenation of 1,4-Butanediol (1,4-BD) to gamma-Butyrolactone (GBL) - Psicon\u00e1utica\" \/>\n<meta property=\"og:description\" content=\"Dehydrogenation of 1,4-Butanediol (1,4-BD) to gamma-Butyrolactone (GBL) A mixture of 90.1g (1 mole) 1,4-butanediol, 4g of copper chromite catalyst and 0.15g of powdered reagent grade sodium hydroxide (or better KOH) was stirred vigorously and heated under reflux. 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