摘要:
A process for producing a 2,3-disubstituted-4-substituted cyclopentanone, an enantiomorph thereof, or a mixture of these in an arbitrary ratio.The process comprises (A) subjecting a 4-substituted-2-cyclopentenone, an enantiomorph thereof, or a mixture of these in an arbitrary ratio, and an organocopper compound to conjugate addition-reaction, and thereafter (B) reacting the resulting enolate intermediate with a halide in the presence of a phenyl organotin compound.
摘要:
An isocarbacyclin derivative represented by the following formula [VII'] ##STR1## wherein A represents, a hydrocarbylcarboxylate group, a carboxymethoxycarbonyl group, an amide group, an acyloxymethyl group or a hydroxymethyl group; R.sup.4 represents H, a methyl group or a vinyl group; R.sup.5 represents a (substituted)alkyl group, a phenyl group, a phenoxy group or a cycloalkyl group; R.sup.e22 and R.sup.e32 represent H or a hydroxyprotecting group; n is 0 or 1;and a pharmaceutically acceptable salt thereof.
摘要:
The present invention provides an industrially very advantageous process for producing prostaglandins E.sub.1 with fewer steps and in higher yield. The process comprises reacting a 7-hydroxyprostaglandin E with a reactive derivative of an organic sulfonic acid in the presence of a basic compound to form the corresponding 7-organic sulfonyloxyprostaglandin E, treating the resulting 7-organic sulfonyloxyprostaglandin E, after or without isolation, in the presence of a basic compound to form a .DELTA..sup.7 -prostaglandin E, thereafter selectively reducing the carbon-carbon unsaturated bond existing on the .alpha.-chain. Some of the 7-hydroxyprostaglandins E and .DELTA..sup.7 -prostaglandins E used in the process are novel compounds.
摘要:
A process for producing prostacyclins of the formula ##STR1## wherein the symbol G.sup.1, R.sup.1, R.sup.2, R.sup.31 and R.sup.41 are as defined in claim 1,which comprises reacting 5,6-dehydroprostaglandins F.sub.2 of the formula ##STR2## wherein the symbol G, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as defined in claim 1,with a mercury (II) compound in an inert organic solvent in the presence of tri(C.sub.1 -C.sub.6)alkylamine, treating the reaction product with a boron hydride compound, and if necessary, subjecting the reaction product to deprotecting reaction, hydrolysis reaction, or salt-forming reaction.This process is industrially advantageous process for the preparation of prostacyclin and its derivatives.
摘要:
The present invention provides a process for the production of PGD.sub.2, wherein 7-hydroxy prostaglandin F.sub.2 .alpha. is treated with thiocarbonyl diimidazole or its analog and subjecting thus treated product to the reaction to deoxidize the hydroxyl group at the 7-position, the reaction to convert the hydroxyl group to a protecting group, and the reaction to oxidize the hydroxyl group at the 11-position, thus giving PGD.sub.2 at a high efficiency.
摘要:
A novel 7-hydroxyprostaglandin E.sub.1, or a stereoisomer thereof, or a protected derivative thereof, having the following formula: ##STR1## wherein R.sup.8 represents H, CH.sub.3 or C.sub.2 H.sub.5, R.sup.9 represents H or CH.sub.3, R.sup.10 and R.sup.11 are identical or different, and each represents H, tetrahydropyranyl or t-butyldimethylsilyl. Also provided is a process for producing an adjacently disubstituted ketone including the above compounds, i.e. 7-oxoprostaglandin, etc. which comprises reacting an .alpha.,.beta.-unsaturated carbonyl compound with a cuprous salt and an organolithium compound in an aprotic inert organic medium in the presence of trialkylphosphine, the amounts of said cuprous salt and said organolithium compound being substantially equimolar, and reacting the product with a protected acetal derivative of an organic carbonyl compound or an aldehyde in the presence of a Lewis acid, if necessary, followed by reacting the product with a proton donor.
摘要:
Novel 5-alkylidene-4-substituted-2-cyclopentenones and 5-(1-hydroxy-aliphatic hydrocarbon)-4-substituted-2-cyclopentenones.These novel cyclopentenones and 5-alkylidene-3-hydroxy-4-substituted cyclopentanones have a pharmaceutical activity for treatment of tumors.
摘要:
A 4-hydroxy-2-cyclopentenone represented by the following formula (I) ##STR1## wherein X represents a hydrogen or halogen atom, A represents a hydrogen atom and B represents a hydroxyl group, or A and B are bonded to each other to represent a bond, R.sup.1 represents a substituted or unsubstituted alkyl, alkenyl or alkynyl group having 1 to 10 carbon atoms, R.sup.2 represents a substituted or unsubstituted alkyl, alkenyl or alkynyl group having 1 to 10 carbon atoms, and R.sup.3 represents a hydrogen atom or a protective group for a hydroxyl group, provided that R.sup.2 is not a 2-octenyl, 8-acetoxy-2-octenyl or 2,5-octadienyl group. The compounds of formula (I) in which A is hydrogen and B is hydroxyl group are prepared by subjecting a 5-unsubstituted cyclopentenone and an aldehyde to aldol condensation reaction. The compounds of formula (I) in which A and B form a bond is prepared by subjecting the compounds of the formula (I) in which A is hydrogen and B is hydroxyl group to dehydration. The compounds (I) are useful for treatment of malignant tumors.
摘要:
Methods and reagents for transition metal-promoted carbonylation via isocyanate using carbon-isotope labeled carbon monoxide are provided. The resultant carbon-isotope labeled compounds are useful as radiopharmaceuticals, especially for use in Positron Emission Tomography (PET). Associated kits for PET studies are also provided.
摘要:
Methods and reagents for transition metal-promoted carbonylation via isocyanate using carbon-isotope labeled carbon monoxide are provided. The resultant carbon-isotope labeled compounds are useful as radiopharmaceuticals, especially for use in Positron Emission Tomography (PET). Associated kits for PET studies are also provided.