专利号:US-6649776-B2 优先权日:2002-01-07 标 题 :Methylenelactone synthesis in supercritical fluids 发明人:MANZER LEO E; HUTCHENSON KEITH W 权利人:DU PONT 摘要:Alpha-methylenelactones are produced from butyrolactone and valerolactone by the addition of formaldehyde in a supercritical fluid in the presence of a catalyst and a phase transfer agent.
专利号:TW-434329-B 优先权日:1997-04-03 标 题:Synthesis of onium hydroxides from onium salts
专利号:JP-2005515219-A 优先权日:2002-01-07 标 题:Synthesis of methylene lactone in supercritical fluid
专利号:CN-119409643-A 优先权日:2024-10-30 标题:Synthesis and refining method of levosimendan
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