Zinc Catalyzed and Mediated Propargylations with Propargyl Boronates
摘要:
The utility of allenyl and propargyl boronates for the propargylation of aldehydes and ketones mediated by zinc is presented. The reaction Is catalytic in zinc with allenyl or propargyl borolanes. The propargylation with crystalline and air-stable propargyl diethanolamine boronates was also achieved. A catalytic cycle is proposed, and preliminary mechanistic studies are discussed.
Re-engineering of PIP3-antagonist triazole PITENIN's chemical scaffold: development of novel antifungal leads
作者:Sravani Pulya、Yadagiri Kommagalla、Duhita G. Sant、Shweta U. Jorwekar、Santosh G. Tupe、Mukund V. Deshpande、Chepuri V. Ramana
DOI:10.1039/c5ra25145a
日期:——
A novel 4-(1-phenyl-1-hydroxyethyl)-1-(o-hydroxyphenyl)-1H-1,2,3-triazole was designed by integrating the structural features of triazole PITENIN anticancer agents and the azole class of antifungal drugs. A two-step protocol comprising the Barbier propargylation and Cu-catalyzed azide–alkyne cycloaddition was established to synthesise a diverse set of compounds of this class. Their screening against
结合三唑PITENIN抗癌剂的结构特点和唑类抗真菌剂,设计了一种新型的4-(1-苯基-1-羟乙基)-1-(邻羟苯基)-1 H -1,2,3-三唑毒品。建立了包括Barbier炔丙基化和Cu催化的叠氮化物-炔烃环加成反应的两步方案,以合成各种此类化合物。他们对各种导致了几个潜在的抗真菌命中的识别和他们中的一些人真菌病原体筛查显示更好的抗真菌活性比对氟康唑光滑念珠菌,隐球菌,烟曲霉及黑曲霉。作用方式研究表明,它们的抗真菌活性是由于抑制羊毛甾醇14α-脱甲基酶(导致麦角固醇耗竭)或活性氧(ROS)产生。
Synthesis of homopropargyl alcohols via sonochemical Barbier-type reaction
作者:Adam Shih-Yuan Lee、Shu-Fang Chu、Yu-Ting Chang、Shu-Huei Wang
DOI:10.1016/j.tetlet.2003.12.058
日期:2004.2
were synthesized from the reaction mixture of zinc powder, 1,2-diiodoethane, 3-bromo-1-propyne and aldehyde or ketone in anhydrous THF under ultrasound. The homopropargyl alcohols were obtained as the only product in all cases when aldehydes were reacted with 3-bromo-1-propyne under this sonochemical Barbier-type reaction condition. The homopropargyl alcohol was produced as the major product and the
One-Pot, Regioselective Synthesis of Homopropargyl Alcohols using Propargyl Bromide and Carbonyl Compound by the Mg-mediated Reaction under Solvent-free Conditions
in organic synthesis is the most important goal in “Green” chemistry. We report a simple, efficient and facile method for the addition of progargyl bromide to carbonyl compounds using Mg metal as a mediator undersolvent-freeconditions which could regioselectively generate homopropargyl alcohols efficiently in good to excellent yields. The procedure has advantages such as short reaction time, operationally
Barbier-type propargylation of carbonyl compounds with propargyl bromide has been achieved with reactive zinc–copper couple under solvent-free conditions. The reaction of aldehydes with propargyl bromide produced the unique homopropargyl alcohols in excellent yields at room temperature without the formation of homoallenyl alcohols. The ketones reacted with propargyl bromide to give the corresponding homopropargyl
Highly Selective Synthesis of Acetylenic Alcohols Promoted by Metallic Dysprosium in the Presence of Mercuric Chloride
作者:Zhiming Li、Yu Jia、Jingyao Zhou
DOI:10.1080/00397910008087415
日期:2000.7
Abstract Promoted by metallic dysprosium, carbonyl compounds react smoothly with propargyl bromide to afford the corresponding homopropargylic alcohols in good to excellent yields without observation of allenic alcohols. In addition, this reaction is regioselective and chemoselective.