摘要:
In the production of isomeric five-membered ring cyclic unsaturated phosphine dichlorides by reacting an organophosphorus dichloride with a diene, the improvement which comprises carrying out the reaction in a carboxylic acid chloride. The product, without isolation, can be directly used in reaction with the carboxylic acid anhydride corresponding to the acid chloride to produce the phosphine oxide, the reaction producing additional acid chloride from the anhydride.
摘要:
Novel phosphonomaleic acid esters of the formula ##STR1## in which R.sup.1 is an optionally substituted alkyl radical containing from 1 to 6 carbon atoms and, where n=0, may also be an optionally substituted aryl radical,R.sup.2, R.sup.3 and R.sup.4 each independently is an optionally substituted alkyl radical containing from 1 to 16 carbon atoms,R.sup.5 is hydrogen, an alkyl or aryl radical containing from 1 to 7 carbon atoms, andn=0 or 1,are produced by reacting a base with a 1-halogen-1-phosphonosuccinic acid ester of the formula ##STR2## in which Hal is chlorine or bromine. The esters are useful as intermediates in the synthesis of sequestrants, corrosion inhibitors, stabilizers, flameproofing agents, pharmaceuticals and pesticides.
摘要:
A process for the preparation of a 3,4-dihydroxy phsopholane oxide of the formula ##STR1## in which R.sup.1 represents an alkyl, alkoxy, alkenyl, alkenyloxy, alkinyl or alkinyloxy with up to 18 carbon atoms and substitution products thereof; aryl and aryloxy having up to 14 carbon atoms and substitution products thereof; cycloalkyl and cycloalkoxy having up to 6 ring carbon atoms and substitution products thereof; dialkylamino having up to 6 carbon atoms per alkyl radical and substitution products thereof; and N-hetero-radicals, andR.sup.2, r.sup.3 and R.sup.4 independently of one another represent a C.sub.1 -C.sub.4 -alkyl radical or hydrogen,Comprising reacting a phospholene oxide of the formula ##STR2## with hydrogen peroxide in the presence of a catalytic amount of an osmium compound at a temperature in the range of about 20.degree. to 150.degree. C, especially about 35.degree. to 100.degree. C.
摘要:
A cyclic phosphine oxide of the formula ##STR1## in which R.sup.1 is an alkyl or an aryl radical having up to 14 carbon atoms,R.sup.2, r.sup.3 and R.sup.4 each independently is a C.sub.1 -C.sub.4 -alkyl radical, hydrogen, chlorine or bromine,X and Y each independently is oxygen or sulfur,a, b, and c each independently is 0 or 1, andR.sup.5 is a C.sub.1 -C.sub.12 -alkyl radical and, where a = 0, also an aryl radical and, where a = 1, an equivalent of a cation,R.sup.6 is a C.sub.1 -C.sub.12 -alkyl radical and, where b = 0, also an aryl radical and, where b = 1, an equivalent of a cation,Is produced by reacting an unsaturated 5-membered cyclic phosphine oxide of the formula ##STR2## with a compound containing a phosphorus-hydrogen bond and of the formula ##STR3## in which R.sup.7 is a C.sub.1 -C.sub.12 -alkyl radical or, where a = 0, also an aryl radical, andR.sup.8 is a C.sub.1 -C.sub.12 -alkyl radical or, where b = 0, also an aryl radical,In the presence of free radicals at a temperature of about 50.degree. C to about 300.degree. C, and the reaction product is optionally hydrolyzed and converted into a salt.
摘要:
This invention relates to a continuous process for the preparation of silane by catalytic disproportionation of trichlorosilane in a reactive/distillative reaction zone having a catalyst bed of catalytically active solid.
摘要:
A process for the recovery by distillation of tributyl phosphate (TBPO) from spent hydraulic oils, which are employed particularly in aircraft used for civilian air traffic.
摘要:
The present invention relates to fluorinated carboxylic acid esters of phosphono- and phosphinocarboxylic acids containing hydroxyl and/or mercapto groups, their use as waterproofing and/or oil-repellency agents, and a method for their preparation.
摘要:
The instant invention relates to a process for producing stable equilibrium mixtures of carbodiimides, uretone imines and organic isocyanates and storage-stable solutions of carbodiimides and uretone imines in polyisocyanates which are free from carbodiimide groups. Either the carbodiimide, or the uretone imine, or both, may contain isocyanate groups. The invention relates to the process for the preparation of these products by so-called heterogeneous catalysis and the use of these products for the production of polyurethane resins.
摘要:
Thermoplastic, branched aromatic polyphosphonates with average molecular weights (number average M.sub.n) of from 11,000 to more than 200,000, obtainable by transesterifying (a) from 97 to 100 moles of at least one diaryl phosphonate, and (b) from 0 to 3 moles of at least one triaryl phosphate--the sum of the moled of (a) and (b) being 100--with (c) from 90 to 99 moles of at least one aromatic dihydroxy compound, and (d) from 0 to 3 moles of at least one aromatic trihydroxy or tetrahydroxy compound--with the proviso that at least one of the components (b) and (d) is present in a quantity of at least 0.001 mole and that, where (b) and (d) are used, the maximum limit on the moles is 3.0.
摘要:
Synergistic arthropodicidal compositions containing (1) a phosphorus-containing compound of the formula ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 each independently is an optionally substituted alkyl, alkenyl or aryl radical, at least one of R.sup.1, R.sup.2 and R.sup.3 being an optionally substituted alkenyl radical unsaturated in the 2-position,X is oxygen or sulphur, andY and Z each independently is oxygen, sulphur or a direct bond; and if both Y and Z are oxygen or sulphur or a direct bond, then any of R.sup.1, R.sup.2 and R.sup.3 can denote propargyl in addition to the radicals indicated above,and (2) at least one (A) carbamate, (B) carboxylic acid ester, (C) phosphoric acid ester other than (1), (D) halogenocycloalkane or (E) halogenoalkane.