The ring opening fluorination of glycidic gem-cyanoesters was achieved by action of pyridine polyhydrofluoride at 25-degrees-C in dichloromethane. The regioselective nucleophilic substitution reaction allows the synthesis of a new class of fluorohydrins with OH, CN and CO2R on the same carbon atom.
本研究旨在开发一种简单、绿色、有效的催化方法来合成具有显着生物活性的1,4-苯二氮卓-5-酮衍生物。该方法涉及邻氨基苯甲酰胺与氰基酯环氧化物在无溶剂条件下反应,使用Ni 2 P 2 O 7作为新型多相催化剂。该载体首次被引入并用作有机化学中的新型非均相催化剂,它是通过共沉淀法制备的,涉及用硝酸镍(Ni(NO 3 ) 2)对重过磷酸钙(TSP)进行改性。 Ni 2 P 2 O 7的表征通过各种光谱技术实现,例如X射线衍射(DRX)、红外光谱(FT-IR)、brunauer-emmett-teller(BET)、X射线光电子能谱(XPS) 、Hg 孔隙率测定法和扫描电子显微镜 (SEM) 结合 (EDAX)。通过优化反应条件,包括溶剂和催化剂用量,我们利用这种创新的合成方法,在相当短的反应时间和绿色反应条件下,1,4-苯二氮卓-5-酮衍生物的收率高达 95%这比以前的方法有了显着的改进。此外,
Chemoenzymatic Synthesis of α-Cyano Epoxides by a Tandem-Knoevenagel-Epoxidation Reaction
作者:Fengjuan Yang、Xiaowen Zhang、Fengxi Li、Zhi Wang、Lei Wang
DOI:10.1002/ejoc.201501501
日期:2016.3
The lipase‐mediated efficient synthesis of α‐cyano epoxides through a tandem‐Knoevenagel–epoxidation reaction is described for the first time. Besides providing a green, mild, and convenient method for the synthesis of α‐cyano epoxides, this work also extends the applicability of lipase in organic synthesis.
A novel class of synthetically important glycidic esters has been obtained via an asymmetric epoxidation of trans‐α‐cyano‐α,β‐unsaturated esters catalysed by a multifunctional Cinchona alkaloid‐derived thiourea/tert‐butyl hydroperoxide (TBHP) system. The glycidic esters, isolated in excellent yield with complete trans‐diastereocontrol and high enantioselectivity, proved to be versatile building blocks
The reaction of anthranilamide 2 with cyanoesters epoxides 1 gives the new class of the 1,4-benzodiazepin-5-ones in good yields (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
A New Method of Synthesis of 2-Alkoxycarbonyl 3-aryg-3,4-dihydro Quinoxalines and 2-Alkoxycarbonyl3-aryl Quinoxalines
作者:Gaz Abderrazak、Souizi Abdelaziz、Coudert Gérard
DOI:10.1080/00397919908085976
日期:1999.10
Cyanoesters epoxides 1, when treated with o-phenylenediamine in presence or absence of hydrogen chloride, at reflux of acetonitrile, give the 2-alkoxycarbonyl-3-aryl-3,4-dihydro quinoxalines and 2-alkoxy carbonyl-3-aryl quinoxalines in good yields.
Ouladyakhlef, Abdesalam; Boukhris, Said; Souizi, Abdelaziz, Bulletin de la Societe Chimique de France, 1997, vol. 134, # 1, p. 111 - 114
作者:Ouladyakhlef, Abdesalam、Boukhris, Said、Souizi, Abdelaziz、Robert, Albert