CAS: 622-58-2; 1-Isocyanato-4-Methylbenzene

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CAS号32315-10-9 三光气 | CAS号106-49-0 对甲苯胺 | CAS号201230-82-2 carbon monoxide | CAS号42868-89-3 2-氧代-2-(对甲苯胺基)乙酸 | CAS号99-99-0 对硝基甲苯 | CAS号2318-82-3 N-hydroxy-4-met... | CAS号5602-96-0 4-甲基乙酰苯胺 | CAS号619-55-6 对甲基苯甲酰胺 | CAS号106-43-4 对氯甲苯 | CAS号917-61-3 氰酸钠 | CAS号109519-47-3 methyl 3-oxo-2-... | CAS号109519-49-5 methyl 1-phenyl... | CAS号4316-53-4 4-甲基三苯胺 | CAS号20172-33-2 N-(4-methylphen... | CAS号21354-40-5 Propanamide,2,2... | CAS号21354-22-3 4-Bromo-N-(4-me... | CAS号4300-33-8 1-(4-methylphen... | CAS号103-72-0 异硫氰酸苯酯 | CAS号25216-04-0 对甲苯-氨基甲酸-2-丙炔酯 | CAS号29209-10-7 2-Methyl-N-(4-m...

对甲基苯甲酸置于羟胺,N,N-二异丙基乙胺,对硝基苯磺酰氯体系中,用 四氢呋喃,水,乙腈 作为反应溶剂,化学反应 17.0H,反应生成 对甲苯异氰酸酯
参考文献:N-甲基咪唑催化异羟肟酸通过洛森重排合成氨基甲酸酯
标题:N-甲基咪唑催化异羟肟酸通过洛森重排合成氨基甲酸酯
摘要:报道了一种有效的,一锅法,N-甲基咪唑 (Nmi) 通过 Lossen 重排加速合成芳香族和脂肪族氨基甲酸酯的方法.nmi 是将异氰酸酯中间体转化为氨基甲酸酯的催化剂.此外,芳基磺酰氯与 Nmi 组合的效用最大限度地减少了在序列过程中经常观测到的异羟肟酸酯-异氰酸酯二聚体的形成.在目前的条件下,降低温度也是可能的,从而实现温和的协议.
DOI:10.1021/ol303424B

专利信息

专利号:US-6924385-B2
优先权日:2002-11-18
标 题:Method for synthesis of aliphatic isocyanates from aromatic isocyanates
发明人：LETTMANN CHRISTIAN; KOHLSTRUK STEPHAN; STOCHNIOL GUIDO; SPYROU EMMANOUIL
权利人:DEGUSSA
摘要:The invention relates to a method for synthesis of aliphatic isocyanates from aromatic isocyanates in substantially 3 stages. In particular, the invention relates to a method for synthesis of bis{4-isocyanatocyclohexyl}methane (H 12 MDI) from bis{4-isocyanatophenyl}methane (MDI). More especially, the invention relates to a method for synthesis of H 12 MDI with a trans-trans isomer content of <30%, preferably of <20%, particularly preferably of 5 to 15%.

专利号:US-4267070-A
优先权日:1979-10-30
标题:Catalyst for the synthesis of aromatic monoisocyanates
发明人：NEFEDOV BORIS K; MANOV-JUVENSKY VLADIMIR I; DERGUNOV JURY I; RYSIKHIN ANATOLY I; CHIMISHKIAN ALEXANDR L
权利人:NEFEDOV BORIS K; MANOV JUVENSKY VLADIMIR I; DERGUNOV JURY I; RYSIKHIN ANATOLY I; CHIMISHKIAN ALEXANDR L
摘要:A catalyst for the synthesis of aromatic monoisocyanates comprising 1.64 to 16.6% by weight of palladium chloride, 0.16 to 47.6% by weight of an oxide of a metal of Group VB of the periodic system, 1.5 to 81.8% by weight of an oxide of a metal of Group VI B of the periodic system, 1.64 to 89.8% by weight of pyridine or an alkylsubstituted pyridine. n The use of the catalyst according to the invention in the synthesis of aromatic monoisocyanates makes it possible to obtain a high degree of conversion of the starting compound of up to 100%, a high yield of the desired product of up to 97%, and increased productivity of the catalyst of up to 40 g of the desired product per g of PdCl 2 per hour.

专利号:US-9994508-B2
优先权日:2012-12-11
标 题:Versatile and functionalised intermediates for the synthesis of vitamin D and novel vitamin D derivatives
发明人：LOPEZ PEREZ BORJA; SIGUEIRO PONTE RITA; MAESTRO SAAVEDRA MIGUEL A; MOURINO MOSQUERA ANTONIO
权利人:ENDOTHERM GMBH
摘要:Novel intermediates for the complete synthesis of vitamin D are provided that allow a great versatility of functional groups in the final vitamin derivatives. Vitamin derivatives that are epimeric in position 3 and vitamin derivatives with a wide range of functionalities in position 18, including compounds with isotopic labelling are provided.

专利号:US-2023348657-A1
优先权日:2020-07-23
标题 :Synthesis of linear polyoxazolidinones using uretdiones as diisocyanate component
发明人：QUELL AGGELIKI; THOMAS HANS-JOSEF; ELING BEREND
权利人:BASF SE
摘要:A process for preparing a thermoplastic polymer involves reacting at least components (a) to (b), in the presence of a catalyst composition (c). Component (a) is an isocyanate composition containing at least one uretdione diisocyanate (a-i), and component (b) is an epoxide composition containing at least one diepoxide (b-i). The catalyst composition (c) contains at least one ionic liquid (c-i), preferably selected from 1-ethyl-3-methyl imidazolium bromide, 1-benzyl-3-methyl imidazolium chloride. 1-butyl-1-methylpiperidinium chloride, 1-ethyl-2,3-dimethylimidazolium bromide, 1-(2-hydroxyethyl)-3-methyl imidazolium chloride, butyl-1-methylpiperidinium acetate, or mixtures of two or more thereof. A thermoplastic polymer obtained or obtainable from the process is useful for the preparation of a fibre or a molded article or as a modifier for another thermoplastic material.

专利号:US-2007282078-A1
优先权日:2006-06-01
标题:Synthesis of aryl N-acylurea from aryl isocyanates or aryl carbodiimides for use as intermediate in novel sequential self-repetitive reaction (SSRR) to form amides, amide-imides and their polymers
发明人：DAI SHENGHONG A; LIN JIANG-JEN; WEI KUAN-LIANG; WU CHIH-HENG; HUANG WEI-HSIANG
权利人:DAI SHENGHONG A; LIN JIANG-JEN; WEI KUAN-LIANG; WU CHIH-HENG; HUANG WEI-HSIANG
摘要:Disclosed is a process for synthesizing an aryl N-acylurea in both high selectivity and high yield, comprising reacting an aryl carbodiimide with a carboxylic acid under mild conditions. Thermolysis of N-acylureas at above about 120° C. gives amides and isocyanates, and the latter will undergo the repetitive reaction sequences in the presence of a carbodiimide catalyst. Based on this unique model, a sequential self-repetitive reaction (SSRR) is also developed in a versatile manner for converting aryl carbodiimides into amides, polyamides, polyamide-imides and polyamide-imide elastomers.

专利号:WO-9102739-A1
优先权日:1989-08-11
标题:Synthesis of glycosides having predetermined stereochemistry
发明人：DANISHEFSKY SAMUEL J
权利人:UNIV YALE
摘要:Methods of stereoselectively preparing a substituted 1,2-anhydrosugar wherein a substituted glycal is converted into a 1,2-anhydrosugar that is utilized to glycosylate a hydroxyl group containing glycal, are disclosed. Methods of preparing a saccharide multimer wherein a nucleophile is reacted with a substituted 1,2-anhydrosugar having a plurality of non-participating substituents, are disclosed. In addition, methods of preparing stereospecific halo-substituted saccharide multimers by haloglycosylation of a glycosyl donor substituted glycal and a glycosyl acceptor glycal derivative in the absence of water and in the presence of a halonium ion, are disclosed. Methods of preparing stereospecific particle-linked halo-substituted saccharide multimers, by haloglycosylation of a particle-linked nucleophilic hydroxyl group with a substituted glycal and a halonium ion, are also disclosed.