Two routes to 1,2-cyclohexanediol catalyzed by zeolites under solvent-free condition

Autor:	Jie Ma, Wenkang Lei, Yunbai Luo, Ping Yu, Zaikun Wu
Rok vydání:	2016
Předmět:	Aqueous solution 010405 organic chemistry Cyclohexene General Chemistry 010402 general chemistry 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound Hydrolysis chemistry Dihydroxylation Organic chemistry Selectivity Hydrogen peroxide Cyclohexene oxide
Zdroj:	Research on Chemical Intermediates. 42:6893-6905
ISSN:	1568-5675 0922-6168
Popis:	Two routes to 1,2-cyclohexanediol were studied. Specifically: (a) the hydrolysis of cyclohexene oxide and (b) the direct dihydroxylation of cyclohexene with aqueous hydrogen peroxide. Both reactions were carried out with zeolites as catalysts under solvent-free conditions, aiming to establish green routes for the synthesis of 1,2-cyclohexanediol. In the first route, H-Beta and H-ZSM-5 zeolites were used as catalysts, respectively. According to the results, H-ZSM-5 was a suitable catalyst for the hydrolysis of cyclohexene oxide. A 88.6 % yield of 1,2-cyclohexanediol could be obtained at a 96.2 % conversion of cyclohexene oxide under mild conditions, and the catalyst could be reused for three times. Compared with H-ZSM-5, H-Beta gave a much lower selectivity (63 %), although it was more active. In the second route, Ti-Beta zeolites with three different Ti loadings prepared via a simple two-step strategy were characterized and used. The results indicated that it was the framework Ti species which was responsible for the catalytic activity. The resultant Ti-Beta-3 % could give a 90.2 % cyclohexene conversion at a 66.2 % selectivity of 1,2-cyclohexanediol.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cb59b3b515b40f6a4e718ac98b7eb80a https://doi.org/10.1007/s11164-016-2503-1 Zobrazit plný text záznamu Plný text ve formátu PDF