CAS: 33543-78-1; Ethyl 1H-Imidazole-2-Carboxylate

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专利信息

专利号:US-7635781-B2
优先权日:2001-05-15
标 题:Synthesis of cyclopentadiene derivatives
发明人：NIFANT EV ILYA; KASHULIN IGOR; IVCHENKO PAVEL; KLUSENER PETER; KORNDORFFER FRANS; DE KLOE KEES; RIJSEMUS JOS
权利人:BASELL POLYOLEFINE GMBH
摘要:A compound of formula (X): n n n n n n n n n n n n wherein n R 1 , R 2 , equal to or different from each other are hydrogen or a linear or branched saturated or unsaturated C 1 -C 20 -alkyl, C 3 -C 20 -cycloalkyl, C 6 -C 20 -aryl, C 7 -C 20 -alkylaryl or C 7 -C 20 -arylalkyl radical, optionally containing heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements; or they can form a C 4 -C 7 ring optionally containing O, S, N, P or Si atoms that can bear substituents; n R 3 is hydrogen or a linear or branched saturated or unsaturated C 1 -C 20 -alkyl, C 3 -C 20 -cycloalkyl, C 6 -C 20 -aryl, C 7 -C 20 -alkylaryl or C 7 -C 20 -arylalkyl radical, optionally containing heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements; or two adjacent R 3 groups can form a C 4 -C 7 ring optionally containing O, S, N, P or Si atoms, wherein said ring can bear substituents; n and at least one of R 1 , R 2 or R 3 is different from hydrogen.

专利号:EP-1926738-B1
优先权日:2005-09-19
标题:Synthesis of cyclopentadienedithiophene derivatives
发明人：GUIDOTTI SIMONA
权利人:BASELL POLYOLEFINE GMBH
摘要:A process for preparing cyclopentadiene derivatives having formula (I) wherein T1 is selected from the group consisting of oxygen (O), or sulphur (S); R1, R2, R3 and R4, are hydrogen atoms, or hydrocarbon radicals; comprising the following steps: a) reacting a compound of formula (II) with a compound of formula (III) in the presence of a palladium or nickel based catalyst and a base; b) contacting the obtained compound with a carbonylating system; and c) treating the product obtained in step b) with a reducing agent.

专利号:US-2008287692-A1
优先权日:2001-05-15
标 题:Synthesis of cyclopentadiene derivatives

专利号:US-2009118522-A1
优先权日:2005-09-19
标题 :Synthesis of Cyclopentadienedithiophene Derivatives

专利号:EP-1387827-B1
优先权日:2001-05-15
标 题 :Synthesis of cyclopentadiene derivatives

专利号:CN-111662233-A
优先权日:2020-06-24
标题 :A kind of method for one-step synthesis of 4-chloro-1H-imidazole-2-carboxylic acid ethyl ester