摘要:
The invention relates to a process for the preparation of enantiomers of trans vinyl-cyclopropane carboxylic acids of the formula I, ##STR1## wherein R is a methyl group or chlorine atom, by resolution of racemic trans compound or mixture of racemic cis and trans compounds by using (+)- or (-)-N-(1-formamido-2,2,2-trichloroethyl)-piperazine as a resolving agent in a polar solvent then separating the crystallizing salt of (+)-trans carboxylic acid and (-)-resolving agent or (-)-trans carboxylic acid and (+)-resolving agent from the mother liquor by filtration and obtaining the enantiomers by acidifying the mother liquor or the salts suspended in water followed by extraction with a solvent and evaporation.The products so obtained may be used as starting materials for the preparation of insecticides.
摘要:
This invention relates to a primycin-containing colloidal basic gel comprising 5-30% of primycin and 95-70% of N-methyl-pyrrolidone-2. The invention also relates to antibacterial compositions particularly for the treatment of acne vulgaris comprising as active ingredient 0.1-100% of a primycin-containing colloidal basic gel, if desired together with further antimicrobial active ingredients, in admixture with 99.9-0% of usual inert pharmaceutical filling, diluting and other formulating additives. The invention also relates to combination composition comprising as active ingredient 1-60% of a primycin-containing colloidal basic gel and 0.1-40% of further pharmaceutical active ingredient(s), e.g. one or more antibiotic(s), chemotherapeutical agent(s), fungistatic or fungicidal agent(s), steroidal or non-steroidal antiinflammatory agent (s), epithelogenic agent(s), local anaesthetic(s), and/or vitamin(s).
摘要:
The invention is directed to a new process for the preparation of carbinols of the general formula I ##STR1## by reaction chloral and olefins of the general formula ##STR2## and by optional acylation of the product comprising dissolving a catalyst of the general formula IIIFe.sub.n (NH.sub.4).sub.x Y.sub.m .multidot.A.sub.p IIIin chloral, then adding the olefin of the general formula II in order to produce a complex of the general formula IV ##STR3## from which a complex of the general formula V ##STR4## is formed, and from the reaction mixture a compound of the general formula I is obtained whereafter(a) the residual complex of the general formula V dissolved in the product is decomposed with an acidic solution and if desired the obtained product is distilled or(b) the product in the reaction mixture is acylated.The compounds prepared according to the invention can be utilized as intermediates when preparing e.g., permethrin and other pyrethroid insecticides.
摘要翻译:本发明涉及一种通过反应式I和通式II的烯烃制备通式I的甲醇的新方法,并通过产物的任意酰化,包括将通式 III Fen(NH4)xYmxAp III,然后加入通式II的烯烃以产生通式IV的复合物IV,其中形成通式V的复合物V, 并且从反应混合物中获得通式I的化合物,之后(a)溶解在产物中的通式V的残余络合物用酸性溶液分解,如果需要,所得产物被蒸馏,或(b)产物 在反应混合物中进行酰化。 当制备例如氯菊酯和其他拟除虫菊酯杀虫剂时,根据本发明制备的化合物可以用作中间体。
摘要:
The invention relates to a new process for preparing unsaturated geminal dihalogen compounds. More particularly, the invention concerns a process for preparing compounds of the formula (I) ##STR1## wherein X is halogen,R.sup.1 is a straight or branched chained alkenyl group having 2 to 6 carbon atoms,by clearing the corresponding 1-substituted 2,2,2-trihaloethylesters.