2-取代苯并噻唑化合物的合成进展

2-取代苯并噻唑在生物医药、材料科学等领域的应用和研究使其合成方法受到了广泛的关注.在传统合成方法的研究基础之上,单质硫介导的氧化还原反应和饱和化合物的脱氢芳构化反应等新方法的发展,为苯并噻唑衍生物的合成提供更多可能.此外,近年来新型金属-有机骨架催化剂、组合离子液体/凝胶、超声以及微波辅助等的应用,极大地丰富了苯并噻唑衍生物的合成方式.综述了近年来2-取代苯并噻唑的合成方法.     

低价钛还原环化σ-酮腈成环戊酮

四氯化钛-锌粉还原环化δ-酮腈是合成环戊酮的一种简便方法。在同样条件下,由4-甲基-4-乙酰基庚二腈得到1,5-二甲基双环-[3.3.0]-2,8-辛二酮。     

Immobilization of HX：[Hmim]X as Halogenating Agent, Recyclable Catalyst and Medium for Conversion of Alcohols to Alkyl Halides

HX is immobilized by reaction of halogen acid with methylimidazole, and the formed ionic liquid [Hmim]X was used as halogenating agent, catalyst as well as medium for conversion of alcohols to alkyl halides. Excellent yields were obtained. The halides produced could be easily separated from the reaction mixture via simple decantation, and the ionic liquid [Hmim]X could be regenerated conveniently by adding equivalent of halogen acids followed by removal of water.     

Synthesis of Arylsubstituted Imidazolin-2-one Analogues

Herein we reported a one-pot synthesis of arylsubstituted imidazolin-2-ones by thecyclization of ct-aminoacetophenone hydrochloride analogues 2 with arylisocyanates 3. Comparedwith other known synthetic route, this method resulted in higher yield.     

Polymer-support Selenium-induced Electrophilic Cyclization： Solid-phase Synthesis of Flavonoids

In recent years, the solid-phase synthesis of small heterocyclic molecules has been a subject of intense research activity. Flavonoids are natural products from plants, which have been shown to elicit antitumoral, antiplatelet, antiischemic, antiallergic,…     

环化“钩和梯”分子的拓扑立体化学研究

在低维拓扑的二维空间，我们构造了环化“钩和梯”分子的刚性拓扑对称性，研究结果表明：Ｃ１刚性拓扑对称性，既是环化“钩和梯”分子的拓扑不变量，又是拓扑手性的判据，扭曲数Ｔ为不同痕变量。拓扑对称性概念的提出，首次探讨了环化“钩和梯”分子的拓扑结构特征。     

Palladium－catalyzed Cascade Cyclization－Coupling Reaction of Benzyl Halides with N, N－Diallylbenzoylamide

A novel type of palladium-catalyzed cascade cyclization-coupling reaction has been found. Reaction of N, N-diallylbenzoylamide 1 with benzyl halides 2 afforded the corresponding dihydropyrroles 3 in moderate to excellent yields.     

Synthesis of 1-Benzoyl-3-aryl-4-hydroxy-4-phenylimidazolidin-2-thiones

l-Benzoyl-3-aryl-4-hydroxy-4-phenylimidazolidin-2-thiones can be synthesized readily from the cyclization of 1-benzoyl-3-arylthioureas with bromine-acetophenone in the presence of excess triethylamiqe.     

新农药研究（Ⅲ）：咪唑啉酮类化合物的合成

Rovral[3-(3,5-二氯苯基)-1-异丙氨基甲酰乙内酰脲]是一种优良的广谱杀菌剂和种子处理剂,由于3,5-二氯苯胺不易制备,本文采用其它取代苯胺作为起始原料,采用固态光气制备异氰酸酯,中间体未经分离,经缩合、关环“一锅法”反应,得到化合物Ⅰ,进一步反应得到Ⅱ、Ⅲ系列新化合物。