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1.发明授权Process for the preparation of methyl 1,1-dichloromethyl ether or of ethyl 1,1-dichloromethyl ether 失效甲基1,1-二氯甲基醚或1,1-二氯甲基乙基醚的制备方法
公开(公告)号：US5672770A
公开(公告)日：1997-09-30
申请号：US545478
申请日：1995-10-19
IPC分类号： B01J31/02 , B01J31/24 , C07B61/00 , C07C41/01 , C07C41/05 , C07C41/22 , C07C43/12 , C07C43/04
CPC分类号： C07C41/22
摘要： The invention relates to a process for the preparation of methyl 1,1-dichloromethyl ether or of ethyl 1,1-dichloromethyl ether, according to which methyl formate or ethyl formate is reacted with phosgene, diphosgene, triphosgene or oxalyl chloride or one of their mixtures, at a temperature of between 40.degree. C. and 100.degree. C., in the presence of a catalyst chosen from the group consisting of trisubstituted phosphine oxides and sulphides, trisubstituted phosphine dichlorides, formamides, the products of reaction of formamides with chlorinating agents and mixtures thereof. The 1,1-dichloromethyl ethers are obtained in a high purity. They are useful especially for performing the formylation of aromatic compounds.
摘要翻译： 本发明涉及一种制备甲基1,1-二氯甲基醚或1,1-二氯甲基乙基醚的方法，根据该方法，甲酸甲酯或甲酸乙酯与光气，双极子，三光气或草酰氯或其中一种 混合物，在40℃至100℃的温度下，在选自三取代的氧化膦和硫化物的催化剂，三取代的二氯化膦，甲酰胺，甲酰胺与氯化剂的反应产物 及其混合物。 以高纯度获得1,1-二氯甲基醚。 它们特别用于进行芳族化合物的甲酰化。
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2.发明授权Silica-based substrates modified by grafting of polyalkylguanidinium groups, their process of manufacture and their use as catalysts 失效通过聚烷基胍基团的接枝改性的二氧化硅基底料，其制备方法及其用作催化剂
公开(公告)号：US5348923A
公开(公告)日：1994-09-20
申请号：US982953
申请日：1992-11-30
IPC分类号： B01J31/26 , B01J21/08 , B01J31/02 , B01J37/02 , C01B33/12 , C07C51/363 , C07C51/60 , C07C67/00 , C07C67/10 , C07C69/24 , C07C69/75 , C07C69/76 , C08G73/02 , C09C1/28 , C09C1/30 , C09C3/08 , C09C3/10
CPC分类号： C07C67/00 , B01J31/0254 , B01J31/0274 , B01J31/0275 , C07C51/363 , B01J21/08 , B01J2231/40 , B01J37/0209
摘要： Silica-based substrate surface-modified by grafting covalent links of organic polysubstituted guanidinium groups, and preferably polyakylguanidinium groups. These substrates can be obtained by reacting silica with a polyalkylguanidinium anion, the silanol residual groups of silica being optionally treated with hexamethyldisilazane to stabilize the substrates. These substrates can be used as chlorination and esterification catalysts.
摘要翻译： 通过嫁接有机多取代胍基的共价键，优选聚烷基胍基表面改性的二氧化硅基底。 这些底物可以通过二氧化硅与聚烷基胍鎓阴离子反应获得，二氧化硅的硅烷醇残基可选择用六甲基二硅氮烷处理以稳定基材。 这些底物可用作氯化和酯化催化剂。
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3.发明授权Process for the synthesis of aliphatic, cycloaliphatic or araliphatic chloroformates 失效用于合成脂族，脂环族或芳脂族氯甲酸酯的方法公开(公告)号：US06696590B2
公开(公告)日：2004-02-24
申请号：US10022963
申请日：2001-12-18
IPC分类号： C07C6996
摘要： The disclosure relates to a process for the synthesis of substituted or unsubstituted aliphatic, cycloaliphatic or araliphatic chloroformates by reaction of the corresponding alcohol with phosgene, diphosgene and/or triphosgene. The reaction is carried out under a pressure of between 15×103 Pa and 85×103 Pa and at a temperature of between −30° C. and +50° C. The process is particularly well suited to the preparation of menthyl chloroformate and benzyl chloroformate.
摘要翻译： 本公开涉及通过相应的醇与光气，双光气和/或三光气的反应来合成取代或未取代的脂族，脂环族或芳脂族氯甲酸酯的方法。 该反应在15×10 3 Pa至85×10 3 Pa的压力和-30℃至+ 50℃的温度下进行。该方法特别适用于制备氯甲酸薄荷酯 和氯甲酸苄酯。
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4.发明授权Process for the preparation of acid chlorides by phosgenation of acids, and catalysts for this process 失效通过酸的光气化制备酰氯的方法和该方法的催化剂
公开(公告)号：US4806286A
公开(公告)日：1989-02-21
申请号：US888208
申请日：1986-07-23
IPC分类号： B01J31/00 , B01J31/02 , C07B31/00 , C07B41/10 , C07B61/00 , C07C51/00 , C07C51/60 , C07C53/38 , C07C57/64 , C07C63/00 , C07C67/00
CPC分类号： C07C51/60
摘要： The invention relates to a new process for the preparation of carboxylic acid chlorides by phosgenation of the corresponding carboxylic acid in the presence of a catalyst.This process is characterized in that the said catalyst is chosen from the compounds represented by the formulae ##STR1## in which R.sub.1 to R.sub.6, which are identical of different, denote: aliphatic, alicyclic, araliphatic or aromatic radicals,or form, in pairs, with the nitrogen atom to which they are attached or with the N-C-N group, a 5- or 6-membered heterocyclic ring.The process applies to most carboxylic acids.The acid chlorides obtained are known and used to produce radical polymerization initiators or pesticides.
摘要翻译： 本发明涉及在催化剂存在下通过相应羧酸的光气化制备羧酸氯化物的新方法。 该方法的特征在于所述催化剂选自由下式表示的化合物：其中不同的相同的R 1至R 6表示：脂族，脂环族，芳脂族或 芳族基团或与其所连接的氮原子或NCN基团成对形成5-或6-元杂环。 该过程适用于大多数羧酸。 获得的酰氯是已知的并且用于产生自由基聚合引发剂或杀虫剂。
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公开(公告)号：US4820856A
公开(公告)日：1989-04-11
申请号：US108996
申请日：1987-10-16
IPC分类号： B01J31/00 , B01J31/02 , C07B61/00 , C07C67/00 , C07C68/02 , C07C325/00 , C07C327/20 , C07C327/22 , C07C329/00 , C07C329/02
CPC分类号： C07C329/00
摘要： The subject of the invention is a new process for the preparation of alkyl thiochloroformates.The process according to the invention consists in reacting phosgene with a mercaptan in the presence of a catalyst which is a hexaalkylguanidinium chloride or the corresponding hydrochloride of general formula: ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 represent alkyl radicals containing 1 to 4 carbon atoms and in which n may take either the value 0 or the value 1.The preferred catalysts are hexamethylguanidinium chloride and its hydrochloride.The process according to the invention enables very pure alkyl thiochloroformates to be obtained with milder operating conditions and simplified purification operations.
摘要翻译： 本发明的主题是制备烷基硫代氯甲酸酯的新方法。 根据本发明的方法在于使光气与硫醇在催化剂存在下反应，催化剂是六烷基氯化胍或通式为：其中R 1，R 2，R 3，R 4，R 5和R 6表示烷基的相应盐酸盐 含有1至4个碳原子的基团，其中n可以取0或值1.优选的催化剂是六甲基胍氯化物及其盐酸盐。 根据本发明的方法使得能够在更温和的操作条件和简化的纯化操作中获得非常纯的烷基硫代氯甲酸酯。
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