Nano-zirconia as an excellent nano support for immobilization of sulfonic acid: a new, efficient and highly recyclable heterogeneous solid acid nanocatalyst for multicomponent reactions
作者:Ali Amoozadeh、Salman Rahmani、Mehrnoosh Bitaraf、Fatemeh Bolghan Abadi、Elham Tabrizian
DOI:10.1039/c5nj02430g
日期:——
Nano-zirconia-supported sulfonic acid as a novel, highly efficient and recyclable heterogeneous nanocatalyst is reported for the synthesis of multicomponent reactions.
报告了一种新型的、高效的、可回收的纳米催化剂——纳米氧化锆支撑的磺酸,用于合成多组分反应。
Tetraethylammonium 2-(carbamoyl)benzoate as a bifunctional organocatalyst for one-pot synthesis of Hantzsch 1,4-dihydropyridine and polyhydroquinoline derivatives
作者:Mahsa Yarhosseini、Shahrzad Javanshir、Mohammad G. Dekamin、Mohammad Farhadnia
DOI:10.1007/s00706-016-1666-1
日期:2016.10
environment-friendly approach for the synthesis of biologically active Hantzsch1,4-dihydropyridine and polyhydroquinoline derivatives in the presence of tetraethylammonium 2-(carbamoyl)benzoate, as an effective bifunctional metal-free catalyst, has been developed via a one-pot multicomponent reaction of various aldehydes, ethyl acetoacetate or cyclic 1,3-dicarbonyl compounds, and ammonium acetate in EtOH
Enantiomeric Recognition of Racemic 4-Aryl-1,4-dihydropyridine Derivatives via Chiralpak AD-H Stationary Phases
作者:Zhi Dai、Charles U. Pittman、Tingyu Li
DOI:10.1002/chir.22083
日期:2012.10
The chromatographic chiral resolution of two new series of racemic 4‐substituted‐1,4‐dihydropyridine derivatives was studied on a commercial Chiralpak AD‐H column. Analytes without 5,5‐dimethyl substituents (1–15) are more efficiently resolved than analytes with 5,5‐dimethyl groups (16–30). The AD‐H column discriminated between enantiomers through both hydrogen bonding attractions and π–π interactions
1, 3-Disulfonic acid imidazolium hydrogen sulphate as an efficient and reusable ionic liquid for the multicomponent synthesis of polyhydroquinoline derivatives under solvent-free conditions
A facile and highlyeffective one-pot synthesis of polyhydroquinoline derivatives is reported via Hantzsch condensation of aldehydes, 1,3-dicarbonyl compounds, ethyl acetoacetate, and ammonium acetate in the presence of 1,3-disulfonic acid imidazolium hydrogensulfate as an efficient and recyclable ionicliquid under solvent-free conditions. This methodology offers several advantages such as short
A new type of SO<sub>3</sub>H-functionalized magnetic-titania as a robust magnetically-recoverable solid acid nanocatalyst for multi-component reactions
作者:Elham Tabrizian、Ali Amoozadeh
DOI:10.1039/c6ra21048a
日期:——
the nanocatalyst was assessed for the synthesis of benzimidazoquinazolinones and polyhydroquinolines, in which the reaction conditions were optimized by applying central composite design (CCD) through response surface methodology. The nanocatalyst could be separated from the reaction mixture easily by magnetic decantation and reused at least six times without a noticeable degradation in catalytic activity
通过两步法合成了SO 3 H-官能化的磁性二氧化钛纳米颗粒(Fe 3 O 4 @ TDI @ TiO 2 -SO 3 H),包括将n-TiO 2共价接枝到n-Fe 3 O 4上。 通过2,4-甲苯二异氰酸酯作为区域选择性连接基(n-Fe 3 O 4 @ TDI @ TiO 2),然后使用氯磺酸进行磺化。制备的纳米催化剂的特征在于傅立叶变换红外光谱(FT-IR),热重分析(TGA),X射线衍射(XRD),场发射扫描电子显微镜(FE-SEM)和振动样品磁力法(VSM)。评估了纳米催化剂的催化活性,用于合成苯并咪唑并喹唑啉酮和聚氢喹啉,其中通过采用响应表面方法应用中心复合设计(CCD)优化了反应条件。可以通过磁倾析法容易地将纳米催化剂从反应混合物中分离出来,并重复使用至少六次,而催化活性没有明显降低。据我们所知,