Matches 101 - 150 out of 205 < 1 2 3 4 5 >
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4939166 Antibiotic KSB-1939 compounds as well as pesticidal agents containing same  
Described are KSB-1939 compounds represented by the following general formula (I): ##STR1## wherein R means ##STR2## in which n stands for an integer of 0-2 and m denotes an integer of 0 or 1, and...
4935531 Antibiotic compounds  
Compounds as described having the partial formula ##STR1## These compounds may have a 5--OH or --OMe group and at the 25- position an isopropylene group substituted by methyl, ethyl or isopropyl....
4933474 Process for the preparation of macrolide compounds  
A process is described for preparing a compound of formula (I) ##STR1## (in which R 1 represents a methyl, ethyl or isopropyl group, R 2 represents a hydrogen atom or a methyl or acetyl group and...
4929638 C.25 [substituted(2-propenyl)]milbemycins  
Antiparasitic milbemycin derivatives having at the C.25 position a substituted 2-propenyl group --C(CH 3 )CH--R 2 wherein R 2 is a C 3 -C 8 alkyl, alkenyl or alkynyl group which may...
4921978 Process for the preparation of a macrolide compound  
A process for preparing the compound of formula (I) ##STR1## which comprises treating the corresponding 23α-compound sequentially with (i) oxalyl chloride and (ii) 2-mercaptopyridine-N-oxide, a...
4920148 Insecticides and parasiticides  
The present invention relates to novel C(29)-oximinomilbemycin derivatives of formula I, to their preparation and to the use thereof for controlling pests. The invention further relates to...
4918096 Antibiotic compounds and method of use  
Compounds are described of formula (I) ##STR1## and salts thereof, wherein R 1 represents a methyl, ethyl or isopropyl group; and OR 2 is a hydroxyl group or a substituted hydroxyl group...
4916120 Parasiticidal avermectin derivatives  
Parasiticidally active avermectin derivatives of the formula ##STR1## in which R 1 stands for hydrogen, OH, C 1 -5 -alkanoyloxy, α-L-oleandrosyloxy, α-L-oleandrosyl-α-L-oleandrosyloxy, 4'-C 1...
4916153 Macrolid compounds  
Compounds of formula (I): ##STR1## and salts thereof; wherein R 1 is --H, --OH or substituted --OH and R 2 is --H, or R 1 and R 2 together with the carbon atom to which they are attached...
4916154 23-Imino derivatives of LL-F28249 compounds  
The present invention relates to novel 23-imino derivatives of LL-F28249α, β, γ, δ, ε, ζ, θ, .iota., and λ compounds. These LL-F28249 compounds (collectively) are isolates from the...
4912090 Antiparasitic milbemycin and avermectin derivatives  
8,9 and/or 14,15 epoxidized and 5-acylated milbemycins and avermectins are prepared from the parent milbemycins and avermectins by epoxidation and acylation (in either order). They have enhanced...
4906619 Alkyl avermectin derivatives  
There are disclosed avermectin derivatives with a hydroxy and hydrocarbon substituents at the 5, 10, 13, 23, 4' and 4" positions which are prepared by the reaction of the 5, 10, 13, 23, 4' or 4"...
4897383 Avermectin derivatives  
There are disclosed novel avermectin derivatives wherein the 3"- or 3'-methoxy group and/or the 4"- or 4'-hydroxyl group are replaced by hydrogen. The 3"- or 3'-desmethoxy-avermectins can further...
4897416 Insecticides and parasiticides  
The present invention relates to novel 5-oximino-13β-carbonylthiomilbemycin derivatives of formula I, to their preparation and to the use thereof for controlling pests. The invention further...
4886830 Mono- and diepoxide derivatives of 23-deoxyl-LL-F28249 compounds  
The present invention relates to novel derivatives of LL-F28249 compounds wherein the 23-hydroxyl group is replaced with hydrogen and the double bond at the C(26,27)-position is epoxidized...
4886784 Novel 23-imino derivatives of 23-keto compounds  
The present invention relates to novel 23-imino derivatives of the compounds collectively referred to as 23-keto C-076 compounds. The C-076 compounds (collectively) are isolates from the...
4886829 23-Oxo (keto) and 23-imino derivatives of mono- and diepoxy LL-F28249 compounds  
The present invention relates to novel 23-oxo (keto) and 23-imino derivatives of certain C(26,27)-epoxy- and C(14,15;26,27)-diepoxy-LL-F28249 compounds. The LL-F28249 compounds (collectively) are...
4886828 Δ.sup.22 -derivatives of LL-F28249 compounds  
The present invention relates to novel derivatives of LL-F28249 compounds. These LL-F28249 compounds preferably are derived via a controlled microbiological fermentation of Streptomyces...
4877888 13-deoxy-23-imino derivatives of 13-deoxy C-076-aglycone compounds  
The present invention relates to novel 23-imino derivatives of C-076 wherein the C-076 compounds are not substituted at the 13-position. The C-076 compounds (collectively) are isolates from the...
4876272 Mono- and diepoxide derivatives of LL-F28249 compounds  
The present invention relates to novel mono- C(26,27) and diepoxide C(14,15;26,27) derivatives of LL-F28249α, β, ε, ζ, θ and .iota. compounds. The LL-F28249 compounds (collectively) are...
4866090 Novel HMG-CoA reductase inhibitors  
Novel 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase inhibitors are useful as antihypercholesterolemic agents and are represented by the following general structural formulae (I) and...
4859657 Pesticides  
Novel compounds of the formula ##STR1## in which R 1 is a hydrogen or a silyl or acyl group, R 2 is methyl, ethyl, isopropyl or sec.-butyl and R is hydrogen, unsubstituted or substituted, linear...
4857544 27-Halo derivatives of LL-F28249 compounds  
The present invention relates to novel derivatives of LL-F28249 compounds wherein the pendent C(26,27) olefinic group at C(25) is converted into a 27-bromo or 27-chloro-26-methylene group. The...
4857509 13β-alkylmilbemycin derivatives for controlling parasites of animals and plants  
The invention relates to parasiticidally and insecticidally highly active compounds of formula I ##STR1## wherein R is C 1 -C 10 alkyl; R 1 is hydrogen, a silyl group or a sugar residue; and ...
4851428 Mono- and diepoxide derivatives of Δ22-LL-F28249 compounds  
The present invention relates to novel derivatives of LL-F28249 compounds wherein the 23-hydroxyl group is eliminated to form a double bond at the C(22,23)-position (Δ 22 ), and the double bond at...
4833168 Avermectin reformatsky adducts  
There are disclosed novel avermectin compounds wherein the glycosyl side chain is substituted with, or replaced by an alkyl ester group in a Reformatsky reaction. The compounds are prepared by...
4831016 Reduced avermectin derivatives  
There are disclosed novel avermectin reduction products. The compounds are prepared by selective catalytic hydrogenation of avermectin-like compounds or by reaction of selected double bonds with...
4826976 Color-shifted dyes with thermally unstable carbamate moiety comprising T-alkoxycarbonyl group  
This invention relates to a color-shifted dye compounds containing at least one thermally unstable carbamate moiety which are useful in thermal imaging. These compounds may be represented by the...
4806527 Avermectin derivatives  
There are disclosed derivatives of avermectin compounds with a Δ26,27-alkyl chain of 4, 5 or 6 members at the 25-position. The compounds are prepared from the known Δ26,27-compounds by the...
4791134 Milbemycin derivatives and the use thereof in pest control  
The invention relates to milbemycin derivatives of formula I ##STR1## wherein R 1 is an aliphatic or aromatic radical or is a pyridyl ring or a heterocyclic oxygen-containing 5- or 6-membered...
4789684 Anthelmintic fermentation products of microorganisms  
There is disclosed a series of macrolides isolated from the fermentation broth of a microorganism identified as MA-5920. This novel microorganism is formed by the protoplast fusion of strains of...
4778809 5-esters of milbemycins for controlling parasitic pests  
The invention relates to ecto- and endoparasitic milbemycins of formula I ##STR1## wherein R is methyl, ethyl, isopropyl or sec-butyl; R 1 is hydrogen, fluorine or C 1 -C 4 alkyl; R 2 is...
4757132 Cyclic polyester oligomer polymerization  
Cyclic polyester and especially polyarylate oligomers, typically having degrees of polymerization from 2 to about 7, are prepared by reacting a bisphenol such as bisphenol A or...
4696922 5-azolylacetoxymilbemycins as ecto- and endoparasites  
The present invention relates to milbemycin derivatives of the formula I ##STR1## wherein X is hydrogen or β-halogen, R is methyl, ethyl, isopropyl or sec-butyl and Az is a 5 membered heterocyclic...
4696945 13β-milbemycin derivatives for controlling ecto- and endoparasites of plants and animals  
The invention relates to parasiticidally and insecticidally highly active compounds of formula I ##STR1## wherein R 1 is hydrogen or a protecting group; R 2 is methyl, ethyl, isopropyl or...
4668696 Novel averonectin fermentation product of a microorganism with anthelmintic activity  
There is disclosed a macrolide isolated from the fermentation broth, with 22,23-dihydro avermectin Bla aglycone as a substrate, of a known microorganism identified as MA-5853. The structure of the...
4666937 Avermectin bioconversion products  
There are disclosed novel compounds which are derived from 22,23-dihydro avermectin Bla aglycone, 13-deoxy-22,23 dihydro overmectin Bla aglycone and 13-deoxy-22,23-dihydro overmectin Blb aglycone....
4587247 Substituted and unsubstituted 13-(alkoxy)methoxy derivatives of the avermectin aglycones, compositions and use  
Novel substituted and unsubstituted 13-(alkoxy)methoxy derivatives of the avermectin aglycones are useful as anthelmintic and antiparasitic agents. The compounds are also useful as pesticides and...
4584314 Lactone derivative, process for the preparation thereof, and use thereof in pest control  
The compound of formula I ##STR1## wherein R 2 is methyl, ethyl, isopropyl or sec-butyl, can be prepared by selective chlorination of an appropriate milbemycin derivative either with hypochlorous...
4582852 14- and 15-hydroxy milbemycin derivatives for controlling plant and animal parasites  
Milbemycin derivatives of the formula I ##STR1## wherein A has the structure ##STR2## or the structure ##STR3## X is either --CH(OR 1 )-- or --CO--, R 1 is hydrogen, a silyl group or an acyl...
4581345 Avermectin 8,9-cyclopropyl compounds, pharmaceutical composition and therapeutic methods of use  
There are disclosed novel avermectin 8,9-cyclopropyl compounds (also referred to as 8,9-dihydro-8,9-methano avermectin compounds). The 8,9-cyclopropyl compounds are prepared by treating an...
4579864 Avermectin and milbemycin 13-keto, 13-imino and 13-amino derivatives  
There are disclosed novel avermectin and milbemycin compounds wherein the 13-position is oxidized to a keto function. The 13-keto derivatives are prepared from the 13-hydroxy compounds by oxidizing...
4560677 Synergistic avermectin combination for treating plant pests  
There is disclosed a novel combination of avermectin compounds and agricultural spray oil which has been found to be synergistic in such a manner as to allow for a drastic reduction in the amount...
RE32034 13-Halo and 13-deoxy derivatives of C-076 compounds  
Derivatives of the C-076 compounds are disclosed wherein the 13-position is unsubstituted. The compounds are prepared by removing the glycosyl groups on the 13-position of the C-076 compounds...
RE32006 13-Halo and 13-deoxy C-076 compounds  
Derivatives of the C-076 compounds are disclosed wherein the 13-position is unsubstituted or substituted by a halogen atom. The compounds are prepared by removing the glycosyl groups on the...
4547520 5-Oxime derivatives of milbemycins and veterinary and agricultural use thereof  
Oxime derivatives of 5-didehydromilbemycins A 3 , A 4 and D are represented by the formula: ##STR1## (wherein R 1 represents methyl, ethyl or isopropyl, and R 2 represents hydrogen, lower alkyl,...
4530921 Avermectin epoxide derivatives and method of use  
There are disclosed novel avermectin compounds wherein certain double bonds are oxidized to epoxides. The epoxides are prepared by oxidizing an avermectin compound with a mild oxidizing agent. The...
4469682 Avermectin and milbemycin phosphate esters, pharmaceutical compositions, and method of use  
There are disclosed novel avermectin and milbemycin compounds wherein the various hydroxy groups are substituted with a phosphate ester group. The phosphate esters are prepared by reacting an...
4463182 Antibiotic roridin E-2  
The present invention relates to roridin E-2 which is represented by Formula I and a process for the production of said compound. ##STR1##
4457920 4a-Substituted avermectin compounds  
There are disclosed novel avermectin compounds wherein the 4-methyl group is substituted with hydroxy or various groups connected through the hydroxy oxygen atom. The hydroxy compounds are prepared...
Matches 101 - 150 out of 205 < 1 2 3 4 5 >