Abstract:
The instant invention relates to a method of phosphorodiamidite production that comprises: (E1) preparing a purified solution of a dialkylamine in a polar solvent as follows:—the dialkylamine dissolved in a polar solvent is contacted with a quantity of phosphorus trihalide that is sufficient to react with the alcohol impurities contained in the dialkylamine but sufficiently low to leave a major part of the dialkylamine unreacted, whereby a mixture is obtained that contains the dialkylamine in the polar solvent and reaction products of the impurities with the phosphorous trihalide;—the unreacted dialkylamine and polar solvent present in the mixture obtained in step (E1.1.) are extracted from the solution S by their difference of volatility, typically by distillation, whereby the purified solution of the dialkylamine in the polar solvent is obtained; (E2) the purified solution of dialkylamine in a polar solvent as obtained in step (E1) is reacted with a phosphorus trihalide, whereby an intermediate compound is formed; (E3) the intermediate compound obtained in step (E2) is reacted with a hydroxyalkyl compound in the presence of a non-polar co-solvent.
Abstract:
This invention provides a novel method for purifying synthetic oligomers comprising capping, polymerizing and separating any failure sequences produced during oligomer synthesis. Either the failure sequence or the full-length oligomer may be polymerized. Optionally, small molecule impurities may also be incorporated into the polymerized material. The invention provides novel capping agents having a polymerizable functional group. The invention also provides kits comprising at least one composition of the present invention.
Abstract:
Synthetic processes are provided wherein oligomeric compounds are prepared having phosphodiester, phosphorothioate, and phosphorodithioate covalent linkages. Also provided are synthetic intermediates useful in such processes.
Abstract:
Polymeric bromine-containing phosphoramidate polyols are obtained by reacting bromine with spirocyclic phosphoramidites and thereafter reacting the brominated products with a polyol, in the presence of an acid acceptor. The novel viscous polymers thus produced react with polyisocyanates to produce polyurethanes. Polyurethanes so made are characterized by improved flame-retardant properties compared with conventional polyurethanes.
Abstract:
CYCLIC PHOSPHAMIDE DERIVATIVES OF THE GENERAL FORMULA:
R1-N(-R2)-P(=O) (WHEREIN R1 AND R2 ARE THE SAME OR DIFFERENT REPRESENTING HYDROGEN ATOMS, LOWER ALKYL GROUPS, HALOGENATED LOWER ALKYL GROUPS OR ARYL GROUPS, OR TAKEN TOGETHER WITH THE NITROGEN ATOM, A 3- TO 6-MEMBERED HETEROCYCLIC RING; R3 IS A HYDROGEN ATOM, LOWER ALKYL GROUP, HALOGENATED LOWER ALKYL GROUP OR ARYL GROUP; R4 AND R5 ARE THE SAME OR DIFFERENT REPRESENTING HYDROGEN ATOMS OR LOWER ALKYL GROUPS; N REPRESENTS A NUMERICAL 0 OR 1) BEING USEFUL AS MEDICAOENTS SHOWING ANTIMICROBIAL, IMMUNOSUPPRESIVE AND/OR ANTITUMOR ACTIVITIES.
Abstract:
NOVEL INSECTICIDALLY ACTIVE PHOSPHORIC ACID AMIDE ESTERS OF THE FORMULA I
R1-O-P(=O)(-NH-R2)-O-(CH3-)C=CH-COO-R3
IN WHICH EACH OF R1, R2 AND R3 REPRESENTS AN ALKYL RADICAL WITH FROM 1 TO 5 CARBON ATOMS INCLUSIVE, ARE PRODUCED BY REACTING A COMPOUND OF THE FORMULA IV
R1-O-P(=O)(-CL)2
WITH AN ALKYLAMINE IN THE PRESENCE OF AN ACID ACCEPTOR, AND THEN REACTING THE RESULTING REACTION PRODUCT WITH THE ENOL FORM OF AN ACETIC ACID ALKYL ESTER OF THE FORMULA LA III
M-O-(H3C-)C=CH-COO-R3
IN WHICH M IS A SALT FORMING AROM OR RADICAL. PREPARATIONS CONTAINING VARYING AMOUNTS OF THE COMPOUNDS OF FORMULA I AND ONE OR MORE DILUENTS (E.G. ISOC TY OCTAGLYCOL ETHER AND/OR A HIGH BOILING PETROLEUM FRACTION AND/OR XYLENE, DIISOHEXYL/HEPTYLPHENYLHEXAGLYCOL ETHER AND ACTONE, AND LAURYLHEXAGLYCOL ETHER AND SO-PROPYL ALCOHOL) ARE USED TO SHOW THE PRESTICIDAL EFFECT OF THE SAID ACTIVE AGENTS BY MEANS OF CONTACT TESTS ON BRUCHIDIUS OBTECTUS AND EPHESTIA (ANAGESTA) KEUNHIELLA, FEED EFFECT ON CARAUSIUS MOROSUS AND ACARICIDAL CONTACT EFFECT ON TETRANYCHUS TELARIUS. SOME COMPARATIVE TESTS ARE ALSO GIVEN TO DEMONSTRATE SUPERIORITY OVER KNOWN COMPOUNDS HAVING PESTICIDAL ACTIVITY, INCLUDING LESSER TOXICITY TOWARDS WARM-BLOODED ANIMALS.
Abstract:
O-(HALOVINYL) PHOSPHORODICHLORIDOTHIOATES ARE USEFUL AS CHEMICAL INTERMEDIATES IN THE PREPARATION OF BIOLOGICALLY ACTIVE O-(HALOVINY) O,O-DIHYDROCARBYL PHOSPHOROTHIOATES.