Abstract:
Chemical compounds having a substituted oxepane ring and methods of preparing such compounds are described. The compounds are active as utero-evacuant agents.
Abstract:
The synthesis of 1RS,4SR,5RS-4-(4,8-dimethyl-5-hydroxy-7-nonen-1-yl)-4-methyl-3,8-dioxabicyclo[3.2.1]octane-1-acetic acid and related compounds is described. The above acetic acid compound and its isomer are contragestational agents.
Abstract:
1,4-Dioxan-2-ones are prepared by contacting carbon monoxide with formaldehyde, a 1,2-glycol, and a catalytic amount of hydrogen fluoride. The products of this reaction are readily converted into diglycolic acids by heating with aqueous caustic in the presence of a nickel catalyst.
Abstract:
Production of alkali metal tetracarbonylferrates by reaction of alkali metal with an iron carbonyl, preferably iron pentacarbonyl, in a suitable solvent and in the presence of an electron carrier, the alkali metal being present in the liquid phase. Also, solvated forms of alkali metal tetracarbonylferrates as new compositions of matter. The alkali metal tetracarbonylferrates are useful in the production of aldehydes, ketones, acids, esters and amides.
Abstract:
The present invention provides a method and apparatus for producing polylactic acid by depolymerizing lactic acid oligomers and subjecting the obtained lactide to ring-opening polymerization, through which lactide can be efficiently obtained. The present invention relates to a lactide production apparatus for continuously or intermittently producing lactide, comprising: a depolymerization device 11 for subjecting lactic acid oligomers to a depolymerization reaction; a catalyst regeneration device 27 for subjecting a residue in the depolymerization device to a depolymerization reaction in order to reduce the molecular weights of lactic acid oligomers contained in the residue; and a distillation column 29 for condensing lactide generated in a gas form as a result of the depolymerization reaction.
Abstract:
The invention relates to a novel method for the synthesis of 2,5-dioxane-1,4-diones having formula (I), comprising the oxidation of the ketone function of a cyclic compound having formula (II), wherein R1, R2, R3 and R4 independently represent the hydrogen atom, halo, (C2-C6) alkenyl, (C3-C7)cycloalkyl, cyclohexenyl and a radical having formula —(CH2)m—V—W.
Abstract:
(Per)haloethers having formula:Xnull(Rf)LnullOnullCF2CF2nullOnullCX1X2nullCFX3X4nullnull(I),process for obtaining them and hypofluorites usable in the synthesis of said (per)haloethers.
Abstract translation:具有式X-(Rf)L-O-CF 2 CF 2 -O-CX 1 X 2 -CFX 3 X 4(I)的(Per)卤代醚,用于获得可用于合成所述(全)卤代醚的方法和次氟酸盐。
Abstract:
New amino-alcohol derivatives and processes for production thereof are disclosed. These compounds exhibit .alpha. and .beta.-adrenergic receptor blocking activity or they act to increase the flow of blood of certain organs.
Abstract:
The synthesis of 1RS,4SR,5RS-4-(4,8-dimethyl-5-hydroxy-7-nonen-1-yl)-4-methyl-3,8-dioxabicyclo[3.2.1]octane-1-acetic acid is described. The bicyclo acetic acid compound is useful as a uteroevacuant agent.
Abstract:
Disclosed is a method for improving the yields of insecticidal compositions produced by reacting an O,O-dialkyl dithiophosphoric acid with a chloro-p-dioxane in the presence of a Lewis acid catalyst and a stoichiometric excess of the acid reactant. More specifically, the method concerns the improvement wherein certain bicyclo-heptenes are added to the system resulting from the reaction and reacted with the excess of O,O-dialkyl dithiophosphoric acid present in the system.