摘要:
Novel compounds containing a heteroatom-bearing bridge and novel complexes of these compounds with metals. The novel compounds and complexes are useful in diagnostic and therapeutic methods.
摘要:
Novel compounds containing a heteroatom-bearing bridge and novel complexes of these compounds with metals. The novel compounds and complexes are useful in diagnostic and therapeutic methods.
摘要:
A compound of formula (I): ##STR1## or a salt, enamine or the like, acylate, sulphonate, carbamate or ether derivative thereof; wherein X, X.sup.1 and X.sup.2 are independently oxygen or sulphur, R.sup.1 is an optionally substituted heterocyclic or cycloalkyl group, and Y is an optionally substituted C.sub.2 -C.sub.4 alkylene group which is optionally interposed by an oxygen atom, a group ##STR2## a group ##STR3## or an optionally mono-substituted nitrogen atom, wherein p is 0, 1 or 2, s is 0 or 1 and R.sup.b is alkyl or alkoxy; provided that when X, X.sup.1 and X.sup.2 are oxygen, R.sup.1 is not pyridyl or pyrimidinyl. Processes for the preparation of these compounds and herbicidal compositions containing them are also described and claimed.
摘要:
A compound in all possible stereoisomeric forms and mixtures thereof of the formula ##STR1## wherein the substituents are defined as in the specification having pesticidal properties.
摘要:
A compound of the formula ##STR1## wherein R.sub.1 is an organic radical having at least 2 carbon atoms;R.sub.2 is an organic radical; andA=CO, CH.sub.2, or CHR.sub.3 where R.sub.3 is unsubstituted or substituted alkyl; andZ.sub.1 and Z.sub.2 are independently selected from hydrogen, halogen, and (C.sub.1 -C.sub.4) alkyland use as a fungicide and biocide.
摘要:
Process for the preparation of herbicidally active substituted cyclohexan-1,3,5-triones which comprises either(a) reacting a compound of formula (II) ##STR1## wherein R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are, for example, hydrogen or C.sub.1 -C.sub.4 alkyl with a compound of formula (III):R.sup.1 COCN (III) wherein R.sup.1 is optionally substituted aryl in the presence of a base and a Lewis acid; or(b) reacting a compound of formula (VI) ##STR2## with a compound of formula (X) ##STR3## in the presence of a Lewis acid; or (c) where R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same, reacting a compound of formula (XI) ##STR4## with a compound of formula R.sup.3 X' in the presence of a base, wherein X' is a leaving group.
摘要:
A compound of the formula ##STR1## wherein R.sub.1 is an organic radical having at least 2 carbon atoms;R.sub.2 is an organic radical; andA.dbd.CO,CH.sub.2, or CHR.sub.3 where R.sub.3 is unsubstituted or substituted alkyl; andZ.sub.1 and Z.sub.2 are independently selected from hydrogen, halogen, and (C.sub.1 -C.sub.4)alkyland use as a fungicide and biocide.
摘要:
According to the present invention there is provided process for preparing a compound of formula (I): ##STR1## or a salt, acylate or sulphonate derivative thereof; wherein R.sup.1 is an optionally substituted aryl group, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are selected from hydrogen, C.sub.1-4 alkyl, C.sub.1-4 alkanoyl or --CO.sub.2 R.sup.a wherein R.sup.a is C.sub.1-4 alkyl or R.sup.2 and R.sup.3 or R.sup.4 and R.sup.5 together with the carbon atom to which they are attached form a C.sub.3-6 cycloalkyl ring, provided that at least R.sub.2 and R.sup.3 or R.sup.4 and R.sup.5 are not both hydrogen and that not more than two of R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are C.sub.1-4 alkanoyl or --CO.sub.2 R.sup.a ; which process comprises reacting a compound of formula (II): ##STR2## wherein R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are as defined in relation to formula (I) with a compound of formula (III):R.sup.1 COCN (III)wherein R.sup.1 is as defined in relation to formula (I) in the presence of a base and a Lewis acid.
摘要:
The invention concerns a process for directly converting an aldehyde into an ethylene ester, of the type wherein the aldehyde is placed in the presence of an alkaline carbonate or bicarbonate and of a phosphonate into a solvent with an alcohol function. In the invention, an ethyl phosphonate or a methyl phosphonate is used and the solvent is an alcohol or a polyol including a hydrocarbon radical other than ethyl or methyl, this radical being that of the ethylenic ester to be produced. The process of the invention makes it possible to directly convert furan aldehyde or tetrahydrofuran aldehyde to produce an ethylenic ester with a furan ring or a tetrahydrofuran ring.