Steroids. LXIX.1,2a,bA Novel Michael Addition-Aldol Condensation Reaction between Acetone and Δ16-12,20-Diketopregnenes

1963 ◽  
Vol 85 (12) ◽  
pp. 1844-1850 ◽  
Author(s):  
Monroe E. Wall ◽  
Samuel. Serota ◽  
Harold E. Kenney ◽  
G. Shuford. Abernethy
Keyword(s):  
Michael Addition ◽  
Aldol Condensation ◽  
Condensation Reaction

scholarly journals Nonanal Sensor Fabrication Using Aldol Condensation Reaction Inside Alkali-Resistant Porous Glass

2021 ◽  
pp. 1-1
Author(s):  
Masato Tsujiguchi ◽  
Takashi Aitoku ◽  
Hironori Takase ◽  
Yasuko Yamada Maru
Keyword(s):  
Porous Glass ◽  
Aldol Condensation ◽  
Condensation Reaction ◽  
Sensor Fabrication

Catalyst-Free One-Pot Synthesis of Novel Heteroarylamine Substituted Furo[3,2-c]coumarins

Synlett ◽  
2018 ◽  
Vol 29 (12) ◽  
pp. 1589-1592 ◽  
Author(s):  
Abolfazl Olyaei ◽  
Mahnaz Saraei ◽  
Reyhaneh Khoeiniha
Keyword(s):  
Michael Addition ◽  
Aldol Condensation ◽  
Ring Closure ◽  
Dehydration Reaction ◽  
One Pot ◽  
Catalyst Free ◽  
One Pot Synthesis ◽  
Tandem Process ◽  
First Time

A high-yielding cyclocondensation of 4-hydroxycoumarin, phenylglyoxal monohydrate, and heteroarylamines proceeds without catalysis, which gives novel functionalized furo[3,2-c]coumarins and heteroarylamino alkylation of coumarin products in acetonitrile under reflux, is reported for the first time. This tandem process involves sequentially an aldol condensation, Michael addition, a ring closure, and dehydration reaction.

Liquid-phase aldol condensation of cyclohexanone on aluminium and iron oxides

1982 ◽  
Vol 47 (8) ◽  
pp. 2235-2245 ◽  
Author(s):  
Zdeněk Vít ◽  
Lubomír Nondek ◽  
Jaroslav Málek
Keyword(s):  
Iron Oxides ◽  
Aldol Condensation ◽  
Condensation Reaction ◽  
Complex Function ◽  
Acid Sites ◽  
Basic Site ◽  
Catalyst Poisoning ◽  
Iron Hydroxides ◽  
Transient Complex ◽  
Kinetics Of

The kinetics of the aldol condensation of cyclohexanone in decalin were investigated at 210 °C on catalysts prepared by drying and calcining the aluminium and iron hydroxides at 110-850 °C. The effect of catalyst poisoning by benzoic acid and pyridine on the course of the condensation reaction and aldol retroaldolisation was also examined. The kinetics of the cyclohexanone condensation can be described by means of Langmuir-Hinshelwood equations which are in agreement with a mechanism involving adsorption of cyclohexanone on a basic site to form a transient complex, reaction of this complex with a cyclohexanone molecule affording the aldol, the rate determining interaction of the aldol with free basic and acid sites yielding 2-(1-cyclohexen-1-yl)cyclohexanone and water and desorption of these products from the catalyst surface. The proposed kinetic model is supported by the results of catalyst poisoning. The activity of aluminium and iron oxides in the condensation of cyclohexanone is a complex function of their basicity and acidity depending strongly on the calcination temperature.

TiO2 nano crystallites catalyzed water mediated microwave assisted regioselective three component domino hydrolysis/aldol condensation/Michael addition reaction of 3-(1,5-dioxo-1,5-diphenylpentan-3-yl)quinolin-2(1H)-one

RSC Advances ◽  
2014 ◽  
Vol 4 (100) ◽  
pp. 57016-57025 ◽  
Author(s):  
Eethamukkala Ubba ◽  
Fazlur-Rahman Nawaz Khan ◽  
Euh Duck Jeong ◽  
Eun Hyuk Chung
Keyword(s):  
Michael Addition ◽  
Addition Reaction ◽  
Aldol Condensation ◽  
Michael Addition Reaction ◽  
Microwave Assisted ◽  
Nano Crystalline

Microwave supported, water intervened, nano crystalline TiO2 catalyzed synthesis of 3-(1,5-dioxo-1,5-diphenylpentan-3-yl)quinolin-2(1H)-ones, is described.

Structure of a new oligomer of glutaraldehyde produced by aldol condensation reaction

1991 ◽  
Vol 56 (2) ◽  
pp. 694-697 ◽  
Author(s):  
Toshio Tashima ◽  
Masahiro Imai ◽  
Yoshihiro Kuroda ◽  
Shigemasa Yagi ◽  
Terumichi Nakagawa
Keyword(s):  
Aldol Condensation ◽  
Condensation Reaction

scholarly journals Hf-based metal–organic frameworks as acid–base catalysts for the transformation of biomass-derived furanic compounds into chemicals

2018 ◽  
Vol 20 (13) ◽  
pp. 3081-3091 ◽  
Author(s):  
Sergio Rojas-Buzo ◽  
Pilar García-García ◽  
Avelino Corma
Keyword(s):  
Aldol Condensation ◽  
Condensation Reaction ◽  
Metal Organic Frameworks ◽  
Acid Base ◽  
Base Catalysts ◽  
Metal Organic ◽  
Furanic Compounds

Hafnium-based metal–organic frameworks are promising catalysts for upgrading biomass derivatives via an aldol condensation reaction.

scholarly journals Synthesis of a novel arginine-modified starch resin and its adsorption of dye wastewater

RSC Advances ◽  
2020 ◽  
Vol 10 (67) ◽  
pp. 41251-41263
Author(s):  
Hao Zhang ◽  
Panlei Wang ◽  
Yi Zhang ◽  
Bowen Cheng ◽  
Ruoying Zhu ◽  
...  
Keyword(s):  
Aldol Condensation ◽  
Condensation Reaction ◽  
Side Reaction ◽  
Hydroxyl Group ◽  
Modified Starch ◽  
Dye Wastewater ◽  
Aldehyde Groups ◽  
Starch Molecule

In the side reaction, the two aldehyde groups in the glutaraldehyde molecules should undergo an aldol condensation reaction with the hydroxyl group in the starch molecule, which has been corrected.

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