Abstract:
PURPOSE:To obtain a new phosphite containing a monovinyl aromatic group and at least one S-P bond, and useful for raw material of resin for optical material such as lens having high refractive index, coating, ink, adhesive, etc. CONSTITUTION:A compound expressed by formula I[A1 is (X1-R3)m (X1 is O or S; R3 is alkylene, phenylene, toluene-alpha-diyl, etc.; (m) is integer of >=0) or group expressed by the formula R4-(X1-R3)m (R4 is same as R3); Y1 and Y2 are H, halogen, alkyl, alkoxy or alkylthio; M is H or alkali metal] is made to react with a phosphorus halide compound expressed by formula II (R1 and R2 are alkyl, aryl, alkoxy, alkylthio, etc.; Z is halogen; (k) and (e) are 0 or 1) to provide the objective phosphite compound expressed by formula III. Furthermore, polymerization of the compound using a radical polymerization initiator gives a polymer for optical material, etc., having small specific gravity and good transparency and weather resistance.
Abstract:
NEW MATERIAL:An O-ethyl-S-n-propyl S-substituted carbamoylmethyl phosphate derivative of formula III (R is alkyl or benzyl group; X is halogen; n is 0, 1, or 2). EXAMPLE:O-Ethyl S-n-propyl S-(N-dibenzylcarbamoylmethyl) phosphorodithioate. USE:Insecticides and miticides capable of controlling a wide variety of harmful insects, mites, particularly tobacco cutworm and diamondback moth, without doin damage to crops. PROCESS:A compound of formula I (M is alkali metal or quaternary ammonium) is reacted with a compound of formula II (Hal is halogen) in an organic solvent, e.g a ketone or nitrile, at room temperature to 100 deg.C, preferably 30-80 deg.C, to give the compound of formula III.
Abstract:
The invention relates to novel specially substituted urethane acrylates based on tris(p-isocyanatophenyl)thiophosphate having a high refractive index and reduced double bond density, and to a method for the production and use thereof.
Abstract:
Improved methods for converting phosphite or phosphonate esters into corresponding thiophosphites or thiophosphonates and for synthesizing specific thiophosphite and thiophosphonate compounds so produced are disclosed and claimed. The methods start from phosphite diesters using P4S10 as the thionation reagent. The reaction mixture is refluxed until the reaction is complete and may be followed by separation and chloroformate ester phosphonation steps to produce pure thiophosphonocarboxylate triesters. Alternatively, these esters may be prepared directly by action of P4S10 on the corresponding phosphonocarboxylate esters. The former method was used to prepare dimethyl thiophosphite and thence trimethyl thiophosphonoformate, a key intermediate in synthesis of salts of thiophosphonoformic acid, which have anti-viral properties.