Abstract: Compounds of formula (I) ##STR1## and salts thereof wherein R.sup.1 is a methyl, ethyl or isopropyl group;R.sup.2 is a hydrogen atom or a group OR.sup.4 (where OR.sup.4 is a hydroxyl group or a substituted hydroxyl group having up to 25 carbon atoms) and R.sup.3 is a hydrogen atom, or (when R.sup.2 is a hydrogen atom) a bromine atom; or R.sup.2 and R.sup.3 together with the carbon atom to which they are attached represent >C.dbd.CH.sub.2, >C.dbd.O or >C.dbd.NOR.sup.5 (where R.sup.5 is a hydrogen atom, a C.sub.1-8 alkyl group or a C.sub.3-8 alkenyl group and the group >C.dbd.NOR.sup.5 is in the E configuration); andY represents an oxygen atom or a group NOR.sup.5 (where R.sup.5 is as defined above); with the proviso that when Y is an oxygen atom and R.sup.1 is an isopropyl group, then R.sup.2 is other than hydroxyl group.These compounds may be used for controlling insect, acarine, nematode or other pests.

Abstract: Compounds of formula (I) ##STR1## and salts thereof, wherein R.sup.1 represents a methyl, ethyl or ispropyl group; R.sup.2 represents a C.sub.2-7 alkyl group interrupted by an oxygen or sulphur atom or an aryl, aryl C.sub.1-7 alkyl or heteroaryl C.sub.1-7 alkyl group; OR.sup.3 is a hydroxyl group or a substituted hydroxyl group having up to 25 carbon atoms; and the group .dbd.NOR.sup.2 is in the E configuration.These compounds may be used for controlling insect, acarine, nematode or other pests.

Abstract: Compounds of formula (I) ##STR1## and salts thereof wherein R.sup.1 is a methyl, ethyl or isopropyl group;R.sup.2 is a hydrogen atom or a group OR.sup.4 (where OR.sup.4 is a hydroxyl group or a substituted hydroxyl group having up to 25 carbon atoms) and R.sup.3 is a hydrogen atom, or (when R.sup.2 is a hydrogen atom) a bromine atom; or R.sup.2 and R.sup.3 together with the carbon atom to which they are attached represent >C.dbd.CH.sub.2, >C.dbd.0 or >C.dbd.NOR.sup.5 (where R.sup.5 is a hydrogen atom, a C.sub.1-8 alkyl group or a C.sub.3-8 alkenyl group and the group >C.dbd.NOR.sup.5 is in the E configuration); andY represents an oxygen atom or a group NOR.sup.5 (where R.sup.5 is as defined above); with the proviso that when Y is an oxygen atom and R.sup.1 is an isopropyl group, then R.sup.2 is other than hydroxyl group.These compounds may be used for controlling insect, acarine, nematode or other pests.

Abstract: Compounds of formula (1) ##STR1## wherein R represents a sugar residue or an acylated derivative thereof;R.sup.1 represents a methyl, ethyl or isopropyl group;Y.sup.1 is --CH.sub.2, Y.sup.2 is --CH-- and X represents ##STR2## [wherein R.sup.2 represents a hydrogen atom or a group OR.sup.6 (where OR.sup.6 is a hydroxyl group or a substituted hydroxyl group having up to 25 carbon atoms) and R.sup.3 represents a hydrogen atom, or R.sup.2 and R.sup.3 together with the carbon atom to which they are attached represent >C.dbd.0, >C.dbd.CH.sub.2 or >C.dbd.NOR.sup.7 (where R.sup.7 represents a hydrogen atom, a C.sub.1-8 alkyl group or a C.sub.3-8 alkenyl group) and the group >C.dbd.NOR.sup.7 is in the E configuration] or --Y.sup.1 --X--Y.sup.2 -- represents --CH.dbd.CH--CH-- or --CH.sub.2 --CH.dbd.C--; andR.sup.4 represents a group OR.sup.6 as defined above and R.sup.5 represents a hydrogen atom, or R.sup.4 and R.sup.5 together with the carbon atom to which the are attached represent >C.dbd.0 or >C.

Abstract: Compounds of formula (1) ##STR1## wherein R.sup.1 represents a methyl, ethyl or isopropyl group; Y.sup.1 is --CH.sub.2 --, Y.sup.2 is --CH-- and X represents ##STR2## [where R.sup.2 represents a hydrogen atom or a group OR.sup.6 (where OR.sup.6 is a hydroxy group or a substituted hydroxyl group having up to 25 carbon atoms) and R.sup.3 represents a hydrogen atom, or R.sup.2 and R.sup.3 together with the carbon atom to which they are attached represent >C.dbd.O, >C.dbd.CH.sub.2 or >C.dbd.NOR.sup.7 (where R.sup.7 represents a hydrogen atom, a C.sub.1-8 alkyl group or a C.sub.3-8 alkenyl group and the group >C.dbd.NOR.sup.7 is in the E configuration)] or --Y.sup.1 --X--Y.sup.2 represents --CH.dbd.CH--CH-- or --CH.sub.2 --CH.dbd.C--; R.sup.4 represents a group OR.sup.6 as defined above and R.sup.5 represents a hydrogen atom, or R.sup.4 and R.sup.5 together with the carbon atom to which they are attached represent >C.dbd.O or >C.dbd.NOR.sup.7a ( where R.sup.7a is as defined above for R.sup.

Abstract: Compounds of formula (I) ##STR1## and salts thereof, wherein R is a C.sub.1-4 alkyl group, R.sup.1 is a methyl, ethyl or isopropyl group; and OR.sup.2 is a hydroxyl or substituted hydroxyl group having up to 25 carbon atoms.These compounds may be used for controlling insect, acarine, nematode or other pests.

Abstract: Compounds of formula (1) ##STR1## and salts thereof, wherein R.sup.1 represents a methyl, ethyl or isopropyl group;Y.sup.1 is --CH.sub.2 --, Y.sup.2 is --CH-- and X represents ##STR2## where R.sup.2 represents a hydrogen atom or a group OR.sup.8 (where OR.sup.8 is a hydroxyl group or a substituted hydroxyl group having up to 25 carbon atoms) and R.sup.3 represents a hydrogen atom, or R.sup.2 and R.sup.3 together with the carbon atom to which they are attached represent >C.dbd.O, >C.dbd.CH.sub.2 or >C.dbd.NOR.sup.9 (where R.sup.9 represents a hydrogen atom, a C.sub.1-8 alkyl group or a C.sub.3-8 alkenyl group) and the group >C.dbd.NOR.sup.9 is in the E configuration] or --Y.sup.1 --X--Y.sup.2 -- represents --CH.dbd.CH--CH-- or --CH.sub.2 --CH.dbd.C--;R.sup.4 represents a group OR.sup.8 as defined above and R.sup.5 represents a hydrogen atom, or R.sup.4 and R.sup.5 together with the carbon atom to which they are attached represent >C.dbd.O or >C.dbd.NOR.sup.9a (where R.sup.

Abstract: A process for the preparation of a compound of formula (I) ##STR1## (in which R.sup.1 is methyl, ethyl or isopropyl) by hydrogenation of a corresponding compound having a double bond at the 22,23-position, for example in the presence of a rhodium catalyst.

Abstract: A process for preparing a compound of formula (I) ##STR1## (where (i) R.sup.1 is an ethoxy group and R.sup.2 is a hydrogen atom, (ii) R.sup.1 is a hydrogen atom and R.sup.2 is a bromine atom or (iii) (R.sup.1 and R.sup.2 together with the carbon atom to which they are attached represent>C.dbd.O) which comprises stereoselectively reducing the corresponding 5-keto compound.

Abstract: Compounds are described of formula (1) ##STR1## and salts thereof wherein R.sup.1 is a methyl, ethyl or isopropyl group;R.sup.2 represents a hydrogen atom or a group OR.sup.4 (where OR.sup.4 is a hydroxyl group or a substituted hydroxyl group having up to 25 carbon atoms) and R.sup.3 represents a hydrogen atom, or R.sup.2 and R.sup.3 together with the carbon atom to which they are attached represent >C.dbd.CH.sub.2, >C.dbd.O or >C.dbd.NOR.sup.5 (where R.sup.5 is a hydrogen atom or a C.sub.1-8 alkyl group and the group >C.dbd.NOR.sup.5 is in the E configuration).These compounds may be used for controlling insect, acarine, nematode or other pests.

Abstract: Compounds are described of formula (I) ##STR1## and salts therof, wherein R.sup.1 represents a methyl, ethyl or isopropyl group;R.sup.2 is alkyl; alkyl substituted by a carboxy or alkoxycarbonyl; alkenyl; phenyl or phenalkyl;R.sup.3 is --OH;OR.sup.4 is a hydroxyl group or a substituted hydroxyl group having up to 25 carbon atoms.These compounds may be used for controlling insect, acarine, nematode or other pests.

Abstract: Compounds are described of formula (II) ##STR1## and salts thereof, wherein R.sup.1 reprsents a methyl, ethyl or isopropyl group;R.sup.2 represents a hydrogen atom or a group OR.sup.5 (where OR.sup.5 is a hydroxy group or a substituted hydroxyl group having up to 25 carbon atoms) and R.sup.3 represents a hydrogen atom, or R.sup.2 and R.sup.3 together with the carbon atom to which they are attached represent a >C.dbd.0 group; andOR.sup.4 represnts a group OR.sup.5 as defined above;with the proviso that when R.sup.2 represents a hydroxy group OR.sup.4 represents a substituted hydroxy group other than a methoxy group.These compounds may be used for controlling insect, acarine, nematide or other pests.

Abstract: Compounds are described of formula (I) ##STR1## and salts thereof, wherein OR is a hydroxyl group or a substituted hydroxyl group having up to 25 carbon atoms, R.sup.1 represents a methyl, ethyl or isopropyl group and the broken line represents a double bond at the 22,23-position or at the 23,24-position.These compounds may be used for controlling insect, acarine, nematode or other pests.

Abstract: A process is described for preparing a compound of formula (I) ##STR1## (in which R.sup.1 represents a methyl, ethyl or isopropyl group, R.sup.2 represents a hydrogen atom or a methyl or acetyl group and R.sup.3 represents a hydrogen atom, or OR.sup.2 and R.sup.3 together with the carbon atom to which they are attached represent the group >C.dbd.0) which comprises treating a corresponding 23.alpha.- compound with a triethyloxonium salt.

Abstract: A process for preparing the compound of formula (I) ##STR1## which comprises treating the corresponding 23.alpha.-compound sequentially with (i) oxalyl chloride and (ii) 2-mercaptopyridine-N-oxide, a catalytic amount of an organic base, and a thiol.

Abstract: Compounds are described of formula (I) ##STR1## and salts thereof, wherein R.sup.1 a methyl, ethyl or isopropyl group;R.sup.2 is --H, --OH, substituted --OH or a phosphate ester group and R.sup.3 is --H, or R.sup.2 and R.sup.3 together with the carbon atom to which they are attached represent a >C=0 groupand OR.sup.4 is a group OR.sup.5 as defined above;with the proviso that either R.sup.2 represents a group OR.sup.5 (where OR.sup.5 is an alkoxy group OR.sup.7 in which R.sup.7 represents a C.sub.1-6 alkyl substituted by a halogen atom or C.sub.2-6 alkyl interrupted by --O-- or --S--) or at least one of R.sup.2 and OR.sup.4 is a phosphate ester group or a group OCONR.sup.10 R.sup.11 (where R.sup.10 and R.sup.11 are --H or C.sub.1-4 alkyl).These compounds may be used for controlling insect, acarine, nematode or other pests.

Abstract: Compounds of formula (I): ##STR1## and salts thereof; wherein R.sup.1 is --H, --OH or substituted --OH and R.sup.2 is --H, or R.sup.1 and R.sup.2 together with the carbon atom to which they are attached represent C.dbd.O, C.dbd.CH.sub.2 or C.dbd.NOR.sup.6 in the E configuration (where R.sup.6 is --H, alkyl or alkenyl);R.sup.3 is --OH or substituted --OH and R.sup.4 is --H, or R.sup.3 and R.sup.4 together with the carbon atom to which they are attached represent C.dbd.O;--A--B-- is --C(CH.sub.3).dbd.CH-- or --C(.dbd.CH.sub.2)CHX-- (where X is Cl or Br) andY is --C(R.sup.8).dbd.CHR.sup.7 -- or --C(.dbd.CH.sub.2)CHXR.sup.7 (where X is Cl or Br, R.sup.7 is methyl, ethyl or isopropyl and R.sup.8 is C.sub.2-8 alkyl or C.sub.7-15 phenalkyl); with the proviso that when --A--B-- is (.dbd.CH.sub.2)CHX--, then Y is--C(C.dbd.CH.sub.2)CHXR.sup.7.These compounds may be used for controlling insect, acarine, nematode or other pests.

Abstract: Compounds are described of formula (I) ##STR1## and salts thereof, wherein R.sup.1 represents a methyl, ethyl or isopropyl group;R.sup.2 represents a hydrogen atom, a C.sub.1-8 alkyl group or a C.sub.3-8 alkenyl group and the group .dbd.NOR.sup.2 is in the E-configuration;OR.sup.3 is a hydroxyl group or a substituted hydroxyl group having up to 25 carbon atoms.These compounds may be used for controlling insect, acarine, nematode or other pests.