scholarly journals Condensation Reactions of Aminoalcohols with Imides. I. Condensation Products of N, N-Diethylaminoethanol with Various Imides; Formation of N, N-Diethylenediamine

1960 ◽  
Vol 81 (2) ◽  
pp. 323-327 ◽  
Author(s):  
Kazuo NAKAJIMA
Keyword(s):  
Condensation Products ◽  
Condensation Reactions

Dimethylformamide Acetals and Bredereck’s Reagent as Building Blocks in Natural Products Total Synthesis

2020 ◽  
Vol 17 (1) ◽  
pp. 47-66
Author(s):  
Franz Bracher
Keyword(s):  
Natural Products ◽  
Total Synthesis ◽  
Alkylating Agents ◽  
Building Blocks ◽  
Methyl Groups ◽  
Open Chain ◽  
Enol Ethers ◽  
Condensation Products ◽  
Condensation Reactions

Dimethylformamide acetals and Bredereck’s reagent (tert-butoxy-bis(dimethylamino) methane) are versatile C1 building blocks due to their ability to undergo condensation reactions with CH-acidic methyl and methylene moieties. Subsequent modulation of the resulting condensation products enables the preparation of open-chain products like aldehydes, ketones, enones, enol ethers, methyl groups, and, most important in alkaloid total synthesis, the annulation of heterocyclic rings like pyridines, pyridine-N-oxides, bromopyridines, aminopyridines, aminopyrimidines, pyrroles and chromenones. In certain cases, these reagents can act as alkylating agents. The applications of these building blocks in natural products total synthesis are reviewed here.

scholarly journals Lanthanoid complexes supported by retro-Claisen condensation products of β-triketonates

2018 ◽  
Vol 47 (48) ◽  
pp. 17469-17478 ◽  
Author(s):  
Laura Abad Galán ◽  
Alexandre N. Sobolev ◽  
Eli Zysman-Colman ◽  
Mark I. Ogden ◽  
Massimiliano Massi
Keyword(s):  
Coordination Polymers ◽  
Claisen Condensation ◽  
Condensation Products ◽  
Condensation Reactions

Structures varying from polynuclear assemblies to coordination polymers are formed when β-triketonate ligands undergo retro-Claisen condensation reactions in the presence of lanthanoids.

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