Abstract: There is disclosed an ester compound that is resistant to decomposition in blood, but is quickly hydrolyzed in cancer cells, and functions as an anticancer agent. The ester compound has a structure represented by formula (I) or formula (II): ##STR1## wherein R.sub.1 represents a methyl group, a methoxy group, or a trifluoroacetamido group; R.sub.2 represents a phenyl group or a phenylmethyl group; and the absolute configuration of the asymmetric center marked with an asterisk is R.

Abstract: There is disclosed an ester compound that is resistant to decomposition in blood, but is quickly hydrolyzed in cancer cells, and functions as an anticancer agent. The ester compound has a structure represented by formula (I) or formula (II): ##STR1## wherein R.sub.1 represents a methyl group, a methoxy group, or a trifluoroacetamido group; R.sub.2 represents a phenyl group or a phenylmethyl group; and the absolute configuration of the asymmetric center marked with an asterisk is R.

Abstract: A flame retardant thermoplastic resin composition which comprises (A) 50 to 90% by weight of a thermoplastic resin which is the base polymer and 50 to 10% by weight of a total of (B) a nitrogen-containing condensed phosphoric acid compound, (C) a comb-like polymer consisting of a polyethylene main chain and a polyoxyalkylene side chain and (D) a metal-containing compound having a carbonization accelerating effect, the amounts of the components (B), (C) and (D) being 5 to 49% by weight, 1 to 15% by weight and 0 to 10% by weight, respectively, in which the total amount of the components (A), (B), (C) and (D) is 100% by weight; a process for producing the composition; a flame-retardant consisting of the components (B), (C) and (D); and a process for producing the flame-retardant.

Abstract: A process for the preparation of a dibromopropyl ether compound having a high melting point, which comprises mixing a bis-dibromopropyl ether of tetrabromobisphenol-sulfone or tetrabromobisphenolpropane represented by the following general formula: ##STR1## in the melted state with a crystallized product of said compound at a temperature lower than the melting point of the crystallized product, and holding the mixture at a temperature of 50.degree. to 100.degree. C.According to this process, the dibromopropyl ether compound of a high melting point can be prepared without using an organic solvent.

Abstract: Bis-(4-hydroxy-3,5-dibromophenyl) sulfone is converted to an allyl ether in the presence of an alkali with allyl chloride in the presence of a bromide and/or an iodide, and/or a substance capable of forming a bromide and/or an iodide by reaction with the alkali.

Abstract: A method for flameproofing cellulosic fibrous materials, which comprises treating a cellulosic fibrous material with a treating liquid comprising 100 parts by weight of an N-hydroxymethyldialkylphosphonopropionamide represented by the following formula: ##STR1## wherein R stands for an alkyl gorup having 1 to 3 carbon atoms, and 10 to 200 parts by weight (as solids) of an antimony oxide sol.

Abstract: A flame retardant for polyolefins, which comprises as an effective ingredient a hardly water-soluble or water-insoluble, nitrogen-containing phosphorus compound obtained by mixing 100 parts by weight of a condensed phosphoric acid compound with 10 to 100 parts by weight of a triazine compound and heating the mixture at 100.degree. to 250.degree. C. in the presence or absence of water.

Abstract: Highly durable flame-retardant thermoplastic polymer compositions contain thermoplastic polymer consisting of an ethylenically unsaturated monomer and from 0.1 to 20%, based on the weight of the thermoplastic polymer, of specific brominated alkoxydiphenyl sulfone derivative of the formula: ##STR1## WHEREIN A is a member selected from the group consisting of a hydrogen atom and allyl, propyl and 2,3-dihalogenopropyl groups, and X.sub.1, X.sub.2, X.sub.3 and X.sub.4 are members selected from the group consisting of chlorine and bromine atoms with at least two of them being bromine atoms.

Abstract: Highly durable flame-retardant polyurethanes can be produced by the process wherein 3 mols of dibromoneopentyl glycol is reacted with 0.5 to 4 mols of phosphoric anhydride, the ester thus obtained is reacted with at least one member selected from the group consisting of alkylene oxides and haloalkylene oxides and then, the phosphorus compound thus obtained, as a portion of a polyhydroxyl component, is incorporated with another polyhydroxyl compound and reacted with a polyisocyanate component in the presence of a catalyst.