Upgrading of Biobased Lactones with Dialkylcarbonates
详细信息 查看全文
- 作者：Alessio Caretto ; Marco No猫 ; Maurizio Selva ; Alvise Perosa
- 刊名：ACS Sustainable Chemistry & Engineering
- 出版年：2014
- 出版时间：September 2, 2014
- 年：2014
- 卷：2
- 期：9
- 页码：2131-2141
- 全文大小：530K
- ISSN：2168-0485
文摘
Four renewable lactones, 纬-butyrolactone, 纬-valerolactone, 未-valerolactone, and 蔚-caprolactone (GBL, GVL, DVL, ECL, respectively) were shown to react with dimethyl-, diethyl-, and dibenzyl-carbonate (DMC, DEC, DBnC, respectively) in the presence of K2CO3 as basic catalyst, to yield selectively either the 伪-alkyl derivatives 1c鈥?b>6c in the case of the five-membered ring GBL and GVL or the highly oxygenated acyclic monomeric derivatives 7a, 8a, and 9a in the case of the six- and seven-membered rings DVL and ECL. Selectivity and reaction conditions are investigated and a reaction mechanism is proposed. The organic carbonates act both as reagent and as reaction solvents, and the catalyst can be recovered by filtration and recycled.