The present application relates to a process for preparing a dicarboxylic acid or dicarboxylic ester according to general formula (IV) R1OOC-(CH2)m-CH2CH2-(CH2)y-COOR4 (IV), comprising the steps of subjecting alkenoic acid or alkenoate of formula (II) R1OOC-(CH2)m-CH=CH-(CH2)x-H (II) to a metathesis reaction in the presence of a metathesis catalyst to form a longer-chain alkenoic acid or alkenoate of formula (III) R1OOC-(CH2)m-CH=CH-(CH2)y-H (III) where x
本申请涉及一种根据通式(IV)R1OOC-(CH2)m-CH2CH2-(CH2)y-COOR4(IV)制备二羧酸或二羧酸酯的方法,包括以下步骤:将通式(II)R1OOC-(CH2)m-CH=CH-(CH2)x-H(II)的烯酸或烯酸酯在存在烯烃交换催化剂的情况下进行交换反应,形成通式(III)R1OOC-(CH2)m-CH=CH-(CH2)y-H(III)的长链烯酸或烯酸酯,其中x
Oxidation of alcohols by electrochemically regenerated nickel oxide hydroxide. Selective oxidation of hydroxysteroids
作者:Johannes Kaulen、Hans-J. Schäfer
DOI:10.1016/0040-4020(82)80110-5
日期:1982.1
Primary alcohols, α,ω-diols and secondary alcohols are easily transformed into carboxylic acids, dicarboxylic acids or ketones, respectively, by heterogeneous oxidation with nickel oxide hydroxide electrochemically regenerated at a nickel hydroxyde electrode. The results are discussed in comparison to those of the nickel peroxide and chromic acid oxidation. The oxidation rate decreases with increasing
伯醇,α,ω-二醇和仲醇很容易分别通过在氢氧化镍镍电极上电化学再生的氧化镍氢氧化物进行多相氧化而分别转化为羧酸,二羧酸或酮。与过氧化镍和铬酸氧化的结果进行了讨论。氧化速率随着醇的空间位阻的增加而降低,从而允许羟基甾族化合物中3位的选择性氧化。
PROCESS FOR PRODUCING AMINOALKYLSULFONIC ACID AND METHOD OF SALT EXCHANGE FOR SALT THEREOF
申请人:Wako Pure Chemical Industries, Ltd.
公开号:EP1548002A1
公开(公告)日:2005-06-29
The present invention relates to a method for efficiently producing an aminoalkylsulfonic acid in an industrial scale, and provides
"a process for producing an aminoalkylsulfonic acid represented by the general formula [2]:
wherein R1 and R2 are each independently a hydrogen atom, an alkyl group, an aryl group or an aralkyl group; and R3 and R4 are each independently a hydrogen atom or an alkyl group,
comprising reacting an aminoalkylsulfonate salt represented by the general formula [1]:
wherein M is an alkali metal atom, an organic ammonium ion or an ammonium ion; and R1 to R4 are the same as described above,
an aqueous solution thereof, or a solution dissolving any one of them in a water-soluble organic solvent, selected from alcohols having 1 to 3 carbon atoms, carboxylic acids having 2 to 12 carbon atoms and dimethylformamide, with an organic acid; and
a method of salt exchange for an aminoalkylsulfonate salt represented by the general formula [1']:
wherein M' is an alkali metal atom, an organic ammonium ion or an ammonium ion; and R1 and R4 are the same as described above, comprising reacting an aminoalkylsulfonate salt represented by the above general formula [2] with a hydroxide represented by the general formula [6]:
M'OH [6]
wherein M' is the same as described above,
in an alcohol or water".
本发明涉及一种在工业规模上高效生产氨基磺酸的方法,并提供“一种生产由通式[2]表示的氨基磺酸的方法:其中R1和R2分别是氢原子、烷基、芳基或芳基烷基;R3和R4分别是氢原子或烷基的氨基磺酸盐发生反应所得的方法,通式[1]表示如下:其中M是碱金属原子、有机铵离子或铵离子;R1至R4与上述相同,其水溶液或将任何一种溶解于水溶性有机溶剂中的溶液,所选的有1至3个碳原子的醇、有2至12个碳原子的羧酸和二甲基甲酰胺,与有机酸反应;以及氨基磺酸盐交换的方法,通式[1']表示如下:其中M'是碱金属原子、有机铵离子或铵离子;R1和R4与上述相同,包括将上述通式[2]表示的氨基磺酸盐与通式[6]表示的氢氧化物发生反应:M'OH [6]其中M'与上述相同,在醇或水中”。
Carbon–Carbon Bond Formation by the Use of Chloroiodomethane as a C<sub>1</sub>Unit. II. The Preparation and Synthetic Application of 1-Chloro-3-iodoheptane
作者:Sotaro Miyano、Hiroshi Hokari、Yoshiharu Umeda、Harukichi Hashimoto
DOI:10.1246/bcsj.53.770
日期:1980.3
Terminal alkenes, R–CH=CH2 (R=Et, n-Pr, n-Bu, n-Hex), were readily transformed into 1-chloro-3-iodoalkanes by the AIBN-induced free radical addition of chloroiodomethane. Thus, 1-chloro-3-iodoheptane was obtained from 1-hexene in an 88% yield; this in turn was allowed to react with dialkyl malonates in the presence of alkoxides in alcohols to give dialkyl 2-butylcyclobutane-1,1-dicarboxylates and dialkyl
通过 AIBN 诱导的氯碘甲烷自由基加成,末端烯烃 R–CH=CH2(R=Et、n-Pr、n-Bu、n-Hex)很容易转化为 1-chloro-3-iodoalkanes。因此,1-氯-3-碘庚烷以88%的产率从1-己烯得到;在醇中的醇盐存在下,这又使其与丙二酸二烷基酯反应,得到 2-丁基环丁烷-1,1-二羧酸二烷基酯和 (E)-3-辛烯-1,1-二羧酸二烷基酯 (7),可以通过选择实验参数优先获得。烯烃产物7进一步用于合成(E)-5-癸烯乙酸酯和/或1,4-壬内酯。
Action d'organolithiens et organomagnésiens sur la propiolactone en présence de sel cuivreux synthèse d'acides carboxyliques
作者:J.F. Normant、A. Alexakis、G. Cahiez
DOI:10.1016/s0040-4039(00)77743-4
日期:1980.1
Organocuprate reagents, as well as Grignard reagents under the catalytic action of copper bromide, react with propiolactone to give the corresponding homologous acid with three more carbon atoms in good yields.
有机铜试剂和格氏试剂在溴化铜的催化作用下与丙内酯反应,以较高的收率得到相应的具有三个以上碳原子的同源酸。
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