Novel Oxidative Resins

Parlow, J.J., Case, B.L. and South, M.S. (1999) High-throughput purification of solution-phase periodinane mediated oxidation reactions utilizing a novel thiosulfate resin. Tetrahedron, 55, 6785-6796. 

Aside from the multifaceted chemical conversions, there are sources to develop into industrially viable microbial conversions. 1,2,4-Butanetriol, for example, used as an intermediate chemical for alkyd resins and rocket fuels, is currently prepared commercially from malic acid by high-pressure hydrogenation or hydride reduction of its methyl ester. In a novel environmentally benign approach to this chemical, wood-derived D-xylose is microbially oxidized to D-xylonic acid, followed by a multistep conversion to the product effected by a biocatalyst specially engineered by inserting Pseudomonas putida plasmids into E. coli ... 

Besides the above CD processes, some of the recent novel applications of CD are outlined below. The production of amines from the hydrogenation of aniline and the selective production of diethanolamine from the reaction of monoethanolamine and ethylene oxide have been reviewed. A patent on the production of phenol from cumene hydroperoxide disclosed that solid acid catalysts such as zeolites, ion-exchange resins achieved 100% conversion with about 60 /o selectivity to phenol at 50-90°C and 0-10 psig. This process utilizes the heat of the decomposition of cumene hydroperoxide to effect the separation of the lower boiling components and hence reduces the energy cost and carbon dioxide emissions. 

Much work has been reported on studying the structure of thermoset resins via SAXS, especially focussing on interpenetrating network polymers (IPNs), thermoset nanocomposites, rubber-modified thermosets and thermoset-thermoplastic blends. Most recently Guo et al, (2003) have examined the use of SAXS to monitor the nanostructure and crystalline phase structure of epoxy-poly(ethylene-ethylene oxide) thermoset-thermoplastic blends. This work proposes novel controlled crystallization due to nanoscale confinements. 

A novel dimethyl ester -lactone from Dammar resin has been shown to have the structure (210) by AT-ray analysis. A very probable biogenesis from asiatic acid [(211)— (212) (210)] has been suggested. Madasiatic acid (213), a close relative of asiatic and madecassic acids, has been isolated from Centella asiatica Protection of the vicinal diol system, followed by oxidation to the 6-ketone and Wolff-Kishner reduction yielded 2o,3)5-dihydroxyurs-12-en-28-oic acid. Rubitic... 

Allylstarch can be blended with lower alkyl itaconates in the ratio from 2 1 to 10 1 and then copolymerized with a variety of coating materials to enhance coating plasticity, drying, and hardening.1028 Allylstarch can be polymerized into insoluble products using either sulfur chloride or disulfur dichloride.1029 The reaction product of allylstarch with propylene oxide was utilized as a dispersant for petroleum emulsions.1030 Novel resinous materials have been obtained from adducts of unsaturated esters of dienophilic dioic acids and cyclic polyenic hydrocarbons with mono- and di-allyl starch.1031... 

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