AbstractA highly anti-diastereoselective three-componentMannichreaction of aromatic amines and aromatic aldehydes with cyclohexanone in the presence of silica-supported ferric hydrogensulfate has been developed. The best selectivity was obtained where there were electron-donating groups on both aldehyde and amine. Selectivity decreases when electron-withdrawing groups are present on the aldehyde;
heterogeneous catalyst for the Mannich reaction. One-pot multi-component condensation of an aldehyde, an amine and a ketone at ambient temperature affords the corresponding β-amino ketones using novel nano-sized Rb2HPW12O40. Simple purification, short reaction time and high yield are some of the advantages of this reaction. Also, the catalyst can be readily isolated. The nano catalyst Rb2HPW12O40 has
IsosteviolProline Conjugates as Highly Efficient Amphiphilic Organocatalysts for Asymmetric Three-Component Mannich Reactions in the Presence of Water
作者:Ya-Jie An、Chuan-Chuan Wang、Zi-Ping Liu、Jing-Chao Tao
DOI:10.1002/hlca.201100265
日期:2012.1
work, six isosteviolamino acid conjugates were designed and synthesized through simple condensation on a large scale without protecting group (Scheme). These amphiphilicorganocatalysts mediated asymmetric three‐component Mannichreactions of cyclohexanone and anilines with aromatic aldehydes in the presence of H2O. Meanwhile, the isosteviolprolineconjugate 3b has been established as a highly efficient
Hassani, Hassan; Shiri, Ali; Khanali, Maryam, Journal of the Indian Chemical Society, 2020, vol. 97, # 6, p. 927 - 939
作者:Hassani, Hassan、Shiri, Ali、Khanali, Maryam
DOI:——
日期:——
Stereoselective Synthesis of <font>β</font>-Amino Ketones via Direct Mannich-Type Reaction Catalyzed with
作者:Masoud Samet、Bagher Eftekhari-Sis、Mohammed M. Hashemi、Fateme Farmad
DOI:10.1080/00397910902906594
日期:2009.11.18
At room temperature, SO42-/TiO2 and SO42-/nano-TiO2 efficiently catalyze the direct Mannich-type reaction of varieties of in situ-generated aldimines using aldehydes and anilines with ketones in a three-component reaction under solvent-free conditions. The reaction proceeds rapidly and affords the corresponding beta-amino ketones in good to high yields with good to excellent stereoselectivity. The catalyst can be recycled for subsequent reactions without any appreciable loss of efficiency.