Solvent-free catalytic preparation of 2,6-dibenzylidenecycloalkanones using 2-hydroxyethylammonium acetate ionic liquid as catalyst
作者:Li Q. Kang、Yue Q. Cai、Hao Wang、Li H. Li
DOI:10.1007/s00706-013-1082-8
日期:2014.2
AbstractVarious 2,6-dibenzylidenecycloalkanones were readily prepared in a condensation reaction catalyzed by 2-hydroxyethylammoniumacetate ionic liquid under solvent-free conditions in excellent yields. The major advantages of the present method are high yields, short reaction times, lack of solvent, simplicity of performance, and low cost. Graphical abstract
A Convenient Synthesis of α,α’-Bis(substituted benzylidene)cycloalkanones Catalyzed by Y(TFA)<sub>3</sub>
作者:Genxiang Luo、Runxia Wang、Chunsheng Liu
DOI:10.1080/15533174.2011.613882
日期:2012.4.1
Aromatic aldehydes undergo crossed aldol condensation with cyclic ketones in the presence of Y(TFA)3 under solvent-free conditions to afford the corresponding α,α’-bis(substitutedbenzylidene)cycloalkanones in satisfactory yields. Furthermore, the catalyst can be recovered conveniently and reused several times in the reaction with comparable yields.
An efficient green approach to aldol and cross-aldol condensations of ketones with aromatic aldehydes catalyzed by nanometasilica disulfuric acid in water
作者:A. Nakhaei、A. Morsali、A. Davoodnia
DOI:10.1134/s1070363217050292
日期:2017.5
Aldol and cross-aldol condensations of aromaticaldehydes with various ketones in the presence of nanometasilica disulfuric acid (NMSDSA) as heterogeneous catalyst are presented. The catalyst was prepared according to the developed earlier method using inexpensive and readily available starting materials. The highly active catalyst gave excellent yields of the desired aldol products without self-condensation
Ash of pomegranate peels (APP): A bio-waste heterogeneous catalyst for sustainable synthesis of α,α′-bis(substituted benzylidine)cycloalkanones and 2-arylidene-1-tetralones
作者:Rupesh C. Patil、Uttam P. Patil、Ashutosh A. Jagdale、Sachinkumar K. Shinde、Suresh S. Patil
DOI:10.1007/s11164-020-04160-5
日期:2020.7
Abstract α,α′-bis(substituted benzylidene)cycloalkanones were efficiently prepared from variously substituted aldehydes and cycloalkanones in water by using ash of pomegranate peels (APP) as a catalyst. The APP-catalyst was obtained from bio-waste by simple thermal treatment to dry peels of pomegranate fruit and formation of its active phase was confirmed by FT-IR, XRD, XRF, EDX, SEM, DSC-TGA and BET
Green, rapid, and highly efficient syntheses of
<i>α</i>
,
<i>α′</i>
‐bis[(aryl or allyl)idene]cycloalkanones and 2‐[(aryl or allyl)idene]‐1‐indanones as potentially biologic compounds via solvent‐free microwave‐assisted Claisen–Schmidt condensation catalyzed by MoCl
<sub>5</sub>
作者:Reza Bakhshi、Behzad Zeynizadeh、Hossein Mousavi
DOI:10.1002/jccs.201900081
日期:2020.4
A new, green, and highly efficient protocol for the expeditious preparation of some α,α′‐bis[(aryl or allyl)idene]cycloalkanones and 2‐[(aryl or allyl)idene]‐1‐indanones via a simple microwave‐assisted Claisen–Schmidt condensation reaction catalyzed by MoCl5 was successfully developed. Outstanding features of the current methodology include the use of solvent‐free conditions, simple operation, use of