CAS: 98-27-1; 4-(Tert-Butyl)-2-Methylphenol

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Allyl-4-T-Butyl-2-Methyl-Phenylaether置于12-Tpa/sba 15体系中,用 1,4-二氧六环 作为反应溶剂,以75%的收率获得产物2-羟基-4-甲基苯甲醛
参考文献:Mcm-41支持的磷钨酸催化烯丙基芳基醚中c-o键的裂解†
标题:Mcm-41支持的磷钨酸催化烯丙基芳基醚中c-o键的裂解†
摘要:使用负载在高表面积材料mcm-41上的固体酸成功地在存在其他氧保护基的情况下从烯丙基芳基醚中除去保护烯丙基.在各种吸电子,给电子和可氧化官能团的存在下,该催化剂表现出优异的活性.该方法对于除去各种天然产物(如香兰素,异香兰素和其他氧官能化的醛和酮)的保护烯丙基也是非常有用的.
DOI:10.1039/c7Nj00375G

专利信息

专利号:US-12098124-B2
优先权日:2019-04-16
标 题:Acid catalyzed synthesis of methyl acrylate from acrylic acid and methanol
发明人：CHAKRABARTI REETAM; NGO MINH N; ELDER JAMES
权利人:ROHM & HAAS
摘要:A method for preparing methyl acrylate comprises:a) heating in a reaction zone a mixture comprising acrylic acid, methanol, and an acid catalyst to react and form a reaction product comprising methyl acrylate which is vaporized with other light components and then fed to a distillation zone, wherein a feed stream entering the reaction zone comprises methanol to acrylic acid in a molar ratio of greater than 1 and less than 2, and a residence time in the reaction zone ranges from 0.25 to 2 hours;b) condensing and phase-separating a distillate from the distillation zone to form an organic phase comprising methyl acrylate and an aqueous phase;c) returning a portion of the organic phase to the distillation zone as organic reflux; andd) feeding the remainder of the organic phase and the aqueous phase of the distillation zone to an extraction column to form a methanol rich aqueous effluent and an organic effluent comprising methyl acrylate.

专利号:US-12252455-B2
优先权日:2019-12-09
标 题 :Process for the continuous preparation of heavy alkyl acrylates
发明人：BELLINI CLEMENT; MAGET SANDRA; DEFER PATRICE
权利人:ARKEMA FRANCE
摘要:The present invention relates to a process for the continuous synthesis of heavy alkyl acrylates by a transesterification reaction using hydrozincite as a heterogeneous catalyst.

专利号:US-12065403-B2
优先权日:2019-04-16
标 题 :Acid catalyzed synthesis of methyl acrylate from acrylic acid and methanol
发明人：CHAKRABARTI REETAM; NGO MINH N; ELDER JAMES
权利人:ROHM & HAAS
摘要:A method for preparing methyl acrylate comprises heating in a reaction zone a mixture comprising acrylic acid, methanol, and an acid catalyst to react and form a reaction product comprising methyl acrylate which is vaporized with other light components and then fed to a distillation zone. A feed stream entering the reaction zone comprises methanol and acrylic acid in a molar ratio of greater than 1 and less than 2, and a residence time in the reaction zone ranges from 0.25 to 2 hours. A distillate from the distillation zone is condensed and phase-separated to form an organic phase comprising methyl acrylate and an aqueous phase. A portion of the organic phase is returned to the distillation zone as organic reflux. The remainder of the organic phase and the aqueous phase of the distillation zone is fed to an extraction column to form a methanol rich aqueous effluent and an organic effluent comprising methyl acrylate. The organic effluent from the extraction column is purified in a single finishing column, wherein a light ends stream is removed from the top of the finishing column, a bottoms stream is removed from the bottom of the finishing column, and methyl acrylate is removed from a side draw stream.

专利号:WO-0039059-A1
优先权日:1998-12-30
标 题 :Synthesis of bisphenols
发明人：CHANG CLARENCE D; VARTULI JAMES C; STEVENSON SCOTT ANDREW; BUNDENS WILLIAM HERBERT
权利人:MOBIL OIL CORP
摘要:The present invention is directed to processes and catalysts for the preparation of bisphenols. A preferred bisphenol is bisphenol A. The catalysts of the present invention comprise a metal oxide modified with an oxyanion. Examples of suitable catalysts according to the present invention include Group IVB metal oxides modified with Group VIB oxyanions.

专利号:WO-2013135701-A1
优先权日:2012-03-13
标题:Synthesis of polyphenol disulphides
发明人：FLECKENSTEIN CHRISTOPH; DENECKE HARTMUT; FUCHS SABINE; MUELLER MATTHIAS; DOERING MANFRED; CISIELSKI MICHAEL; WAGNER JOCHEN; DEGLMANN PETER; NALAWADE SAMEER; GUTMANN PETER; HAHN KLAUS; MASSONNE KLEMENS; KLEINKE ANDREAS; KRAEMER ROLAND HELMUT
权利人:BASF SE
摘要:The invention relates to a process for producing a polyphenol disulphide of formula (I) by reacting one or more mercaptophenols of formula (II) with one or more oxidizing agents, optionally in the presence of one or more bases, where the symbols R 1 , R 2 , R 3 , R 4 and n have the meanings given in the description.

专利号:US-11485702-B2
优先权日:2018-10-02
标 题 :Aminoalkyl (meth)acrylate stabilisation
发明人：BELLINI CLEMENT; CABON YVES; DEFER PATRICE
权利人:ARKEMA FRANCE
摘要:The present invention relates to the use of a stabilizing composition comprising at least one N-oxyl compound and at least one polymerization inhibitor other than an N-oxyl compound, for inhibiting transesterification catalyst degradation in a process for the synthesis of aminoalkyl (meth)acrylates. Preferably, the transesterification catalyst is a titanium organometallic compound and the stabilising composition comprises at least one N-oxyl derivative and at least one polymerization inhibitor chosen from phenolic compounds and phenothiazine compounds in a weight ratio of between 1 and 10, preferably between 4 and 10, limits inclusive.