专利号:US-8153839-B2 优先权日:2005-09-14 标题:Method for synthesis of keto acids or amino acids by hydration of acetylene compound 发明人:OGO SEIJI; FUKUZUMI SHUN-ICHI 权利人:OGO SEIJI; FUKUZUMI SHUN-ICHI; JAPAN SCIENCE & TECH AGENCY 摘要:An object of the present invention is to provide a method for synthesis of keto acids by hydration of an acetylene compound (acetylene-carboxylic acids) under mild conditions free from harmful mercury catalysts and a method for synthesis of amino acids from acetylene-carboxylic acids in a single container (one-pot or tandem synthesis). In one embodiment of the method according to the present invention for synthesis of keto acids, acetylene-carboxylic acids is hydrated in the presence of a metal salt represented by General Formula (1), n nwhere M 1 represents an element in Group VIII, IX, or X of the periodic table, and X 1 , X 2 , or X 3 ligand represents halogen, H 2 O, or a solvent molecule, and k represents a valence of a cation species, and Y represents an anion species, and L represents a valence of the anion species, and each of K and L independently represents 1 or 2, and k×m=L×n.
专利号:US-6583315-B2 优先权日:2000-12-23 标 题:Process for preparing ethanebis(alkylphosphinic) acids 发明人:SICKEN MARTIN; WEFERLING NORBERT; SCHMITZ HANS-PETER 权利人:CLARIANT GMBH 摘要:The invention relates to a process for preparing ethanebis(alkylphosphinic) acids by n a) reacting elemental yellow phosphorus with alkyl halides in the presence of alkali metal hydroxide or of alkaline earth metal hydroxide to give a mixture whose main constituents are the alkali metal salts and/or alkaline earth metal salts of alkylphosphonous, phosphorous, and hypophosphorous acid, n b) liberating alkylphosphonous, phosphorous, and hypophosphorous acid by adding mineral acids, and also at the same time precipitating the alkali metal ions and, respectively, alkaline earth metal ions in the form of their salt of the mineral acids, and then n c) esterifying the alkylphosphonous acid from the mixture of the alkylphosphonous, phosphorous, and hypophosphorous acid, n d) isolating the ester of alkylphosphonous acid from the mixture and hydrolyzing the same to give alkylphosphonous acid, and n e) preparing, from the alkylphosphonous acid, the corresponding ethanebis(alkylphosphinic) acid of the general formula (I) where R 1 and R 2 may be identical or different and are hydrogen, a carboxy group, a carboxylic acid derivative, an unsubstituted or substituted alkyl group having from 1 to 10 carbon atoms, phenyl, benzyl, or alkyl-substituted aromatics, and R 3 and R 4 are identical or different and are an unsubstituted or substituted alkyl group having from 2 to 20 carbon atoms, by free-radical-initiated reaction with alkynes, and also to the use of the ethanebis(alkylphosphinic) acids prepared by this process as starting material for preparing flame retardants and precursors for the synthesis of other phosphorus-containing compounds.
专利号:EP-1932824-A1 优先权日:2005-09-14 标题:Method for synthesis of keto acid or amino acid by hydration of acethylene compound
专利号:US-2009216044-A1 优先权日:2005-09-14 标 题:Method for synthesis of keto acids or amino acids by hydration of acetylene compound
专利号:US-4276220-A 优先权日:1979-07-25 标题:Novel norbornyl-substituted pyrans, method for their synthesis and use thereof in perfumery 发明人:WILLIS BRIAN J; DITTRICK JOHN W 权利人:FRITZSCHE DODGE & OLCOTT INC 摘要:Norbornyl-substituted pyrans, their preparation and their use as olfactory components of perfume formulations are disclosed.
专利号:US-10647942-B2 优先权日:2016-12-22 标题:Fragrance and flavor materials 发明人:BLANDINO MAUREEN; LANKIN MICHAEL E 权利人:TAKASAGO PERFUMERY CO LTD 摘要:The present disclosure is directed to the synthesis and application of undecavertol derivatives having unique and desired flavor and/or fragrant characteristics. The compounds of the present disclosure can be employed alone or incorporated as fragrance or flavor ingredients in fragrance or flavor compositions. The present disclosure is also directed to consumer products comprising such derivatives and/or fragrance or flavor compositions.
参考标题:Regioselective Synthesis Of 2,3,4-Trisubstituted Pyrroles Via Pd(II)-Catalyzed Three-Component Cascade Reactions Of Amines, Alkyne Esters, And Alkenes 作者:Xu Zhang,Xuefeng Xu,Gong Chen,Wei Yi |发布日期:2016.10.7 摘要:Three-Component Cascade Reaction Of Diverse Amines, Alkyne Esters, And Alkenes Is Disclosed For The Direct Synthesis Of Diverse 2,3,4-Trisubstituted Pyrroles With Broad Functional Group Tolerance And In Good To Excellent Yields. This Transformation Is Supposed To Proceed Through The Cascade Formation Of C(Sp2)-C(Sp2) And C(Sp2)-N Bonds Via Pd(II)-Catalyzed Regioselective Alkene Migratory Insertion, Intramolecular
合成参考文献
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