专利号:US-5783698-A 优先权日:1996-01-23 标题:Chemical synthesis of 1,3-disubstituted quinazolinediones 发明人:SMITH ADRIAN LEONARD 权利人:MERCK SHARP & DOHME 摘要:The present invention relates to a method for the synthesis of 1,3-disubstituted quinazolinedione derivatives which comprises: n (a) reacting a haloformate functionalized polystyrene resin with a substituted anthranilic acid derivative under conditions effective to form a urethane-linkage; n (b) reacting the product of step (a) with a primary amine under conditions effective to form an anthranilamide derivative; n (c) heating the anthranilamide to effect intramolecular cyclization thereby liberating the 1,3-disubstituted quinazolinedione derivative from the resin into solution; and n (d) isolating the 1,3-disubstituted quinazolinedione by filtration and solvent removal.
专利号:US-4293503-A 优先权日:1980-01-10 标题 :Synthesis of polyol bis(allyl carbonate) utilizing reagent recovery and recycle 发明人:YOUNG ELGIN E 权利人:PPG INDUSTRIES INC 摘要:Disclosed is an improved method of forming polyol (allyl carbonate) monomers. In the disclosed method, the organic by-products as diallyl carbonate and unreacted reagents as allyl alcohol are separated from the brine and wash water derived aqueous phase and returned to the allyl carbonate synthesis reaction. The aqueous phase is further separated to recover allyl alcohol therefrom, which is returned to the allyl carbonate synthesis reactor as an azeotrope.
专利号:GB-2067194-A 优先权日:1980-01-10 标题 :Synthesis of polyol bis (allyl carbonate)
专利号:CH-647223-A5 优先权日:1980-01-10 标 题 :SYNTHESIS OF BIS (ALLYL-Carbonate) POLYOL WITH RECOVERY AND RECYCLING REAGENT.