Stetter Reaction in Room Temperature Ionic Liquids and Application to the Synthesis of Haloperidol
作者:Siddam Anjaiah、Srivari Chandrasekhar、René Grée
DOI:10.1002/adsc.200404123
日期:2004.9
Imidazolium-type roomtemperatureionic liquids (RTILs) have been used for the Stetter reaction, affording the desired 1,4-dicarbonyl compounds in good yields. Thiazolium salts and Et3N are efficient catalysts for this reaction performed in ionic liquid. The possibility to recycle and reuse the solvent has been demonstrated, although it was not possible to recycle the thiazolium catalyst. This method
Formation of 1,4-diketones via bis-acylation of the conjugated carbon–carbon double bonds in acrylates, acrylamides, methyl vinyl ketone and styrenes with aroyl chlorides promoted by samarium metal in DMF
作者:Yongjun Liu、Yongmin Zhang
DOI:10.1016/j.tet.2003.08.038
日期:2003.10
Promoted by samarium in DMF, aroyl chlorides react readily with conjugated carbon–carbondoublebonds in acrylates, acrylamides, methyl vinyl ketone and styrenes in a bis-acylation manner. These reactions proceed smoothly under mild conditions without the need of pretreating or activating the metallic samarium, affording the corresponding 1,4-diketones in good to excellent yields.
Synthesis, characterization, and evaluation of antioxidant activity of new - and -imino esters
作者:Hasniye YAŞA
DOI:10.3906/kim-1801-8
日期:——
basis of elemental analysis, IR, 1 " role="presentation"> 1 1 ^1} H NMR, 13 " role="presentation"> 13 13 ^13} C NMR, and GC-MS spectroscopic techniques. In addition, antioxidantactivity of the synthesized compounds was evaluated on the basis of DPPH radical.
通过缩合-5-(呋喃-2-基)-5-氧戊酸甲酯,-4-(呋喃-2-基)-4-氧丁酸甲酯,-5-(噻吩-2-基)甲基缩合合成新的席夫碱。 )-5-氧戊酸和4-(噻吩-2-基)-4-氧丁酸甲酯,其中p为“角色=“ presentation”> ppp-茴香胺,n为“角色=” presentation“> nnn-丁胺。这些合成的化合物的结构在元素分析,红外光谱,1“角色=”表示“> 1 1 ^ 1} H NMR,13”角色=“ present”>“> 13 13 ^ 13} C NMR的基础上得以阐明,以及GC-MS光谱技术。另外,基于DPPH自由基评估了合成化合物的抗氧化活性。
作者:Imran Khan、Zhibin Luo、Yin Xu、Jimin Xie、Weihua Zhu、Bin Liu
DOI:10.1002/hlca.202000028
日期:2020.5
A direct approach to γ‐keto esters through cascade alkyne‐aldehyde reductive C−C coupling of propargyl esters and aromatic aldehydes under transition‐metal‐free (TM‐free) fashion was developed. Compared with multistep processes, this procedure provides a fast path using commercially available materials and could be handled conveniently to produce various γ‐keto esters in moderate yields.
Synthesis and elastase inhibition activities of novel aryl, substituted aryl, and heteroaryl oxime ester derivatives
作者:Belma Hasdemir、Ozlem Sacan、Hasniye Yasa、Hatice B. Kucuk、Ayse S. Yusufoglu、Refiye Yanardag
DOI:10.1002/ardp.201700269
日期:2018.2
Fifteen novel aryl, substitutedaryl and heteroaryl γ‐hydroxy‐ (2a–e), γ‐methoxyimino‐ (3a–e), and γ‐benzyloxyimino‐ (4a–e) butyric acid methyl esters were investigated for their enzyme inhibition, and the synthesis of 10 compounds (3a–e, 4a–e) is given in this study. The other five compounds (2a–e) were synthesized before in another study. Compounds 3a–e and 4a–e were synthesized in this work as original