The Knoevenagel condensation reactions between aromatic and α,β-unsaturated aromatic aldehydes with barbituric acid can effectively be performed in ionic liquid without additional acid or base catalyst, it is a simple efficient method for the synthesis of benzylidene barbituric acids, which have been widely used in pharmaceutical chemistry as well as in organic synthesis.

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The aqueous or aqueous/organic biphase reaction systems were studied to meet the requirement of the developing green chemistry.

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With the development of life science and biological engineering, chiral separation and recognition have been payed close attention universally ,which have important significance in organic chemis- try, life science and medicinal chemistry.

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In a word, organic electrosynthesis has been an important part of green chemistry.

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Combinatorial chemistry is a type of synthetic strategy which systematically connects a set of"building blocks"such as amino acids, nucleotide and small organic molecules to yield a large array of diverse molecular entities described as a combinatorial library. It also refers to the process of screening the compounds with the expective activity from the library.

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Woodson or apocynum venetum Linn as raw material, it utilizes the method of decoction and alcohol sedimentation to remove impurity. After extract is separated by macroporous adsorptive resins, then use polydextran gel LH-20 to purify, obtain isoquercitrin. Compared with the method of traditional silica gel column chromatography, this method has characteristics such as: experiment period is short, dissipation of organic dissolvent is little, yield of produced product is high, and purity coefficient is fine and so on. Isoquercitrin produced by this invention can be provided for medicine research or used as chemistry control article.

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Colombo J C%Silverberg N%Gearing J N Biogeochemistry of Organic Matter in the Laurentian Trough-Composition and Vertical Fluxes of Rapidly Setting Particulate Matter 10.1016/0304-4203(95)00059-3 Marine Chemistry , 1996b,null

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With the help of the rich and varied supramolecule, organic substances, inorganic substance, polymer and biological substance and so on, it can make various design of modifying layers on the surface of electrode. It includes multivariate, multilayers, polycomponent, micronize, etc. That will make the detection more sensitive and more widely applied in analytic chemistry.

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This review on organobismuth chemistry is carried out as the following four aspects:(1) the molecular structure characteristics and synthesis of new organobismuth compounds;(2) as reagents for cross-coupling, oxidation, arylation, and other reactions;(3) as catalysts for organic synthesis;(4) as medicines for the treatment of ulcers, anti-tumor and radio-therapy, etc.

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