摘要:
Diphenic acid bis(dicyclohexylamide) represented by the following formula: ##STR1## A process for producing diphenic acid bis(dicyclohexylamide) represented by the above formula, which comprises dimerizing a diazonium salt of o-aminobenzoic acid in the presence of a reducing agent, followed by acidification to give 2,6'-dicarboxylbiphenyl; converting this dicarboxylic acid to 2,6'-dichloroformylbiphenyl by chlorination; and reacting this acid chloride with dicyclohexylamine.Sustained release antimicrobial compositions comprising a clathrate compound consisting of a microbial agent and diphenic acid bis(dicyclohexylamide) represented by the above formula.
摘要:
A sustained release antimicrobial agent comprises a clathrate compound composed of a water-soluble microbicide and at least one of the compounds shown at (I) to (V) below:(I) 1,1'-bi-2-naphthol;(II) 1,1,4,4-tetraphenyl-2-butyn-1,4-diol;(III) 9,10-di(4-methylphenyl)-9,10-dihydroznthracene-9,10-diol;(IV) 1,1-bis(4-hydroxyphenyl)-cyclohexane; and(V) 1,1,6,6-tetra(2,4-dimethylphenyl)-2,4-hexadiyne-1,6-diol.A method which uses it for preventing the fouling of a water system is also disclosed.
摘要:
A d- or l-tartaric acid amide derivative serving as a host compound and a method of producing the amide derivative which combines with a guest compound to form a clathrate compound and which is expressed by the following Formula (A) or (B): ##STR1##
摘要:
A biphenyl compound having the formula (I) is newly separated into its optical active compound and useful as an optically separating agent: ##STR1## wherein W, X and Y are each an atom or atomic group selected from among H, F, Cl, Br, I, CH.sub.3, CF.sub.3, OH, OCH.sub.3, NH.sub.2 and N(CH.sub.3).sub.2 and Z is an atom or atomic group selected from among Cl, Br, I, CH.sub.3 and OCH.sub.3, R is an atomic group having 1 to 20 carbon atoms and containing a polar functional group selected from among ##STR2##
摘要:
A process for the separation of an alkyl-substituted naphthalene from a mixture containing the desired alkyl-substituted naphthalene and at least one isomer thereof comprises placing 9,9'-bianthracene in contact with the mixture to form a clathrate complex of the formula ##STR1## wherein A represents 2-methylnaphthalene, 2-isopropyl-naphthalene of 2,6-diisopropylnaphthalene, collecting the clathrate complex by filtration, subjecting the clathrate complex to thermal decomposition, and then recovering the alkyl-substituted naphthalene derivative.
摘要翻译:从含有所需烷基取代萘和至少一种异构体的混合物中分离烷基取代的萘的方法包括使9,9'-双蒽与该混合物接触以形成下式的包合物络合物:IMA IMA >(I)其中A表示2-甲基萘,2,6-二异丙基萘的2-异丙基萘,通过过滤收集包合络合物,使包合物络合物热分解,然后回收烷基取代的萘衍生物。
摘要:
A compound represented by the general formula (I) and a separating agent comprising the same: ##STR1## wherein Ar and Ar' are each an aromatic group; and the positional relationship of the two substituents on the central benzene ring may be any of ortho, meta and para.The above compound is effective in the separation and purification of many compounds to and enables the provision of various compounds (such as intermediates of drugs) which are useful in the field of fine chemicals, particularly optically active substances, at high purities and in large amounts.
摘要:
Disclosed is a method of producing an optically active .beta.-lactam derivative of the formula ##STR1## comprising irradiating with light, in solid phase, an inclusion complex of a compound of the formula ##STR2## with an optically active host compound.
摘要:
An optically active propargyl alcohol derivative of the formula (I) ##STR1## wherein X=phenyl or thienyl and R=lower alkyl, halogenated methyl, phenyl or substituted phenyl having at least one lower alkyl radical and or halogen atom, is prepared by contacting a racemic modification of l- and d-isomers of the formula (I) with l-brucine in an organic solvent, by separating the resultant deposited diastereomer from a solution containing the resultant other diastereomer in the organic solvent, by decomposing each diastereomer with an aqueous mineral acid solution in the presence of an organic solvent capable of dissolving the corresponding optically active isomer dissociated from the diastereomer and incompatible with water so as to allow the optically active isomer to be dissolved in the water-incompatible organic solvent, and by recovering the optically active isomer from the solution thereof.
摘要:
An optically active substance having an optical purity of at least 50% e.e. is obtained by an asymmetric photochemical reaction by converting a starting, achiral material in a chiral crystalline form and irradiating light to the chiral crystalline form to effect the photocyclization of the starting material.
摘要:
Alkynol type compounds of the following formula (I): ##STR1## [wherein R.sub.1 -R.sub.5 and R.sub.6 -R.sub.10 each represent hydrogen atoms or lower alkyl group and R.sub.11 represents a lower alkyl group or a group of the formula: ##STR2## (wherein R.sub.1 -R.sub.5 and R.sub.6 -R.sub.10 are as hereinbefore defined); at least one of R.sub.1 -R.sub.5 and at least one of R.sub.6 -R.sub.10 being lower alkyl grops.] These compounds are capable of forming and precipitating crystalline complexes with alcohols when added to an aqueous solution of alcohol. Thus, these compounds are useful for separating alcohols from aqueous solutions of alcohols.