凯茵化工讯 洛阳师范学院化学化工学院杨艳良博士，利用双功能高分散负载钯催化剂和固体碱催化剂，实现了由生物质基5-羟甲基呋喃(HMF)转化为可食用香料甲基环戊烯醇酮(MCP)。相关成果日前发表于《绿色化学》。

　　MCP是一种高档、广谱的食用香料，广泛应用于食品、医药以及烟草等行业中。目前工业上MCP主要由石油路线制得，该路线反应步骤多，收率低，并且反应过程中需要使用大量有机溶剂和有毒有害试剂如氯气等。

　　科研人员S次采用饱和环己烯水溶液为还原剂，制备得到了高分散负载钯催化剂。该催化螯合剂剂在HMF催化加氢制备羟基己二酮中表现出很高的活性和选择性。所得产物无须分离，直接在氧化铝基固体碱上异构化得到MCP。两步反应总收率高达58%。该路线全程以水为溶剂，且不使用有毒有害试剂，原料价廉易得且为可再生资源，具有极高的环境效益和经济价值。

Luoyang Teachers College to achieve a new route of synthetic spices

Kai Yan Chemical Luoyang Normal University Institute of Chemistry and Chemical Engineering, Dr. Yang Yanliang, the use of dual-function highly dispersed supported palladium catalyst and solid base catalyst to achieve from the biomass 5-hydroxymethyl furan (HMF) into edible flavor A Cyclopentenolone (MCP). Related results recently published in "green chemistry."

MCP is a high-grade, broad-spectrum flavoring that is widely used in food, medicine and tobacco industries. At present, MCP is mainly produced by the petroleum route in the industry. This route has many reaction steps, low yield, and requires a large amount of organic solvents and toxic and hazardous reagents such as chlorine gas during the reaction.

For the first time, researchers used a saturated cyclohexene aqueous solution as a reducing agent to prepare a highly dispersed supported palladium catalyst. The catalyst showed high activity and selectivity in the catalytic hydrogenation of HMF to prepare hydroxyhexanedione. The resulting product is isomerized directly onto an alumina-based solid base to yield the MCP without isolation. The total yield of the two-step reaction is as high as 58%. The course of the whole water as solvent, and do not use toxic and hazardous reagents, raw materials cheap and renewable resources, with high environmental benefits and economic value.