摘要:
A compound of the formula (I) wherein the bond between carbon atoms 22 and 23 indicated with a broken line is a single or double bond, m is 0 or 1, R1 represents a C1-C12alkyl, C3-C8cycloalkyl or C2-C12alkenyl group, R2 represents a hydrocarbyl group or a substituted hydrocarbyl group, and R3 and R4 represent, independently of each other, hydrogen or a chemical constituent, or either R2 and R3 together or R3 and R4 together represent a three- to seven-membered alkylene or a four- to seven-membered alkenylene bridge, for each of which at least one, preferably a CH2 group may be replaced by O, S or NR6 where R6 represents hydrogen or a hydrocarbyl group or a substituted hydrocarbyl group; or, if appropriate, an E/Z isomer and/or tautomer of the compound of formula (I), in each case in free form or in salt form.
摘要:
A safe and effective process for the oxidation of a primary or secondary alcohol to the corresponding aldehyde or ketone via the reaction of said alcohol with an anhydride solution of a 1,1,1-tri(CZ-C4alkanoyloxy-1,1-dihydro-1,2-benziodoxol 3(1 H)-one, and a composition useful in this process.
摘要:
A compound of the formula (I) wherein the bond between carbon atoms 22 and 23 indicated with a broken line is a single or double bond, m is 0 or 1, R1 represents a C1-C12alkyl, C3-C8cycloalkyl or C2-C12alkenyl group, R2 represents a hydrocarbyl group or a substituted hydrocarbyl group, and R3 and R4 represent, independently of each other, hydrogen or a chemical constituent, or either R2 and R3 together or R3 and R4 together represent a three- to seven-membered alkylene or a four- to seven-membered alkenylene bridge, for each of which at least one, preferably a CH2 group may be replaced by O, S or NR6 where R6 represents hydrogen or a hydrocarbyl group or a substituted hydrocarbyl group; or, if appropriate, an E/Z isomer and/or tautomer of the compound of formula (I), in each case in free form or in salt form.
摘要:
Novel avermectin derivatives are disclosed, wherein the 5-hydroxy group is replaced by an oxime group. The avermectin-5-oximes can further be derivatized at the 4"- or 4'-positions as amino, substituted amino, acylhydrazone, semicarbazone, or substituted semicarbazone analogues. The avermectin-5-oximes are prepared by the oxidation of the 5-hydroxy compounds with manganese dioxide or with pyridinium dichromate to the known 5-oxo analogues, and these are then reacted with a hydroxylamine salt. The new compounds are potent anti-parasitic agents, in particular, the compounds are anthelmintic, insecticidal and acaricidal agents.
摘要:
A safe and effective process for the oxidation of a primary or secondary alcohol to the corresponding aldehyde or ketone via the reaction of said alcohol with an anhydride solution of a 1,1,1-tri(CZ-C4alkanoyloxy-1,1-dihydro-1,2-benziodoxol 3(1 H)-one, and a composition useful in this process.
摘要:
The flowability of crystalline sucralose can be increased by treating the crystalline material in a fluidised bed at ambient temperature with additions of water, followed by a fluidised drying phase. Fluidisation by means of an upward current of air at 25-35 DEG C and added water at 20-50 % by weight, e.g. 25-40 %, is preferred.
摘要:
Macrolides of formula (I) and methods of treatment of resistance to transplantation, fungal infections and autoimmune diseases such as rheumatoid arthritis and psoriasis using said macrolides of formula (I), wherein n is 1 or 2; A and B are taken together and form =O or A and B are taken separately and are each H or A is OH and B is H; R1 is a desosamino group; R2 is OH or a desosaminyloxy group; and R3 is an alkyl or allyl group.