摘要:
Herstellung von a-Vinylpropionsäureestern aus a-Vinylpropionitril. Die a-Vinylpropionsäureester lassen sich leicht in y-Halogentiglinsäureester überführen, die wertvolle C 5 -Bausteine z.B. in derTerpenchemie darstellen.
摘要:
A process is herein described for obtaining lower alkyl esters of C-alkyl-tartronic or C-halogenalkyl-tartronic acids according to the reaction: in which R and R 2 , like or unlike each other, may be alkyls having C 1 -C 6 or halogenalkyls having C 1 -C 5 and R 1 is an alkyl having C 1 -C 5
摘要:
Alkene, die an mindestens einer Seite der Doppelbindung verzweigt sind, oder Cycloalkene werden mit Cyanwasserstoff mit Hilfe der bis zu etwa zweifachen molaren Menge starker Säuren bei Anwesenheit von primären oder sekundären Alkanolen unmittelbar zu N-tert.-Alkylaminen oder Cycloalkylaminen und Estern der Ameisensäure umgesetzt.
摘要:
An α,β-dihydropolyprenyl derivative having the formula (I): wherein X represents a group of-COOR 1 or-CH 2 OR 2 in which R, is the hydrogen atom or a lower alkyl group and R 2 is the hydrogen atom or an aliphatic acyl group having one to four carbon atoms; and n is an integer of one to four. A process for the preparation of the α,β-dihydropolyprenyl derivative and a therapeutic agent for treatment of liver diseases comprising the same are also disclosed.
摘要翻译:一种具有式(I)的α,β-二氢吡喃衍生物:其中X代表-COOR 1或-CH 2 OR 2的基团,其中R 1是氢原子或低级烷基,R 2是氢原子或脂族酰基, 1至4个碳原子; 并且n是1至4的整数。 还公开了用于制备α,β-二氢聚苯乙烯衍生物和用于治疗肝病的治疗剂的方法。
摘要:
A method for producing a compound represented by the following formula (2) (wherein, X, R 1 and m represent respectively the same meaning as described below) which comprises reacting a compound represented by the following formula (1) (wherein, X represents an optionally substituted alkyl group or the like. R 1 represents an optionally substituted alkyl group or the like. m represents an integer of 0 to 4. When m represents an integer of 2 to 4, R 1 s may be the same or different from each other) with hydrogen cyanide in an amount of 1.2 to 5 mol with respect to 1 mol of the compound, in the presence of an organic base, in an organic solvent.
摘要:
The present invention relates to a process for the cyclopropanation with ethylene carbonate or ethylene sulfate of a compound of formula (II): wherein G is -CN or -COOR in which R is a C 1 -C 4 straight or branched alkyl X and Y are independently selected from the group consisting of hydrogen, fluorine, chlorine, bromine, iodine, R 1 O- and R 1 S- wherein R 1 is C1-C4 straight or branched alkyl chain.