Sequential One-Pot Combination of Multireactions through Multicatalysis: A General Approach to Rapid Assembly of Functionalized Push−Pull Olefins, Phenols, and 2-Methyl-2<i>H</i>-chromenes
作者:Dhevalapally B. Ramachary、Kinthada Ramakumar、Adluri Bharanishashank、Vidadala V. Narayana
DOI:10.1021/cc100104k
日期:2010.11.8
the sequential cascade one-pot synthesis of library of highly substituted push-pull olefins, phenols and 2-methyl-2H-chromenes was reported through multicatalysis cascade (MCC) reactions. Direct sequential one-pot combination of amine- or amino acid-catalyzed cascade Knoevenagel/Michael/aldol condensation/decarboxylation with other reactions like amine- or amino acid-catalyzed cascade Claisen-Schmi
High-yielding synthesis of Nefopam analogues (functionalized benzoxazocines) by sequential one-pot cascade operations
作者:Dhevalapally B. Ramachary、Vidadala V. Narayana、M. Shiva Prasad、Kinthada Ramakumar
DOI:10.1039/b910397j
日期:——
An efficient amine-/ruthenium-catalyzed three-step process for the synthesis of Nefopam analogues was achieved through combinations of cascade enamine amination/iso-aromatization/allylation and diene or enyne metathesis as key steps starting from functionalized Hagemann's esters. In this communication, we discovered the application of ruthenium-catalysis on olefins containing free amines without in situ formation of salts.
Organocatalytic Triazole Formation, Followed by Oxidative Aromatization: Regioselective Metal-Free Synthesis of Benzotriazoles
作者:Dhevalapally B. Ramachary、Adluri B. Shashank
DOI:10.1002/chem.201301412
日期:2013.9.23
we report on our studies on the sequential one‐pot combinations of amine‐catalyzed multicomponent reactions (MCRs). We have developed the copper‐free synthesis of functionalized bicyclic N‐aryl‐1,2,3‐triazole and N‐arylbenzotriazole products 4 and 5 from the simple unmodified starting materials through [3+2]‐cycloaddition ([3+2]‐CA) and oxidative aromatization reactions in one pot under amine catalysis
Organocatalytic Cascade Reactions Based on Push−Pull Dienamine Platform: Synthesis of Highly Substituted Anilines
作者:Dhevalapally B. Ramachary、Kinthada Ramakumar、Vidadala V. Narayana
DOI:10.1021/jo0623639
日期:2007.2.1
novel one-pot organocatalytic selective process for the cascade synthesis of highlysubstituted o-hydroxydiarylamines and o-pyrrolidin-1-yldiarylamines is reported. Direct combination of amine-catalyzed cascade Knoevenagel/Michael/aldol condensation/decarboxylation and cascade enamine amination/isoaromatization of alkyl acetoacetates, aldehydes, and nitrosoarenes furnished the highly functionalized
报道了一种实用且新颖的一锅有机催化选择性方法,用于高度取代的邻羟基二芳基胺和邻吡咯烷基-1-基二芳基胺的级联合成。胺催化的级联Knoevenagel / Michael /醛醇缩合/脱羧与乙酰乙酸烷基酯,醛和亚硝基芳烃的级联烯胺胺化/异芳构化的直接结合提供了高官能度的苯胺,收率很高。
Amino Acid-Catalyzed Cascade [3+2]-Cycloaddition/Hydrolysis Reactions Based on the Push-Pull Dienamine Platform: Synthesis of Highly Functionalized<i>N</i>H-1,2,3-Triazoles
作者:Dhevalapally B. Ramachary、Kinthada Ramakumar、Vidadala V. Narayana