Stereoselective synthesis of hydrazinodihydrofurans via cascade Michael addition–substitution involving the reaction of curcumin and other β-dicarbonyls with α-hydrazinonitroalkenes

2020 ◽  
Vol 18 (1) ◽  
pp. 140-153 ◽  
Author(s):  
Kalisankar Bera ◽  
Narasimham Ayyagari ◽  
Nishikant Satam ◽  
Irishi N. N. Namboothiri
Keyword(s):  
Michael Addition ◽  
Stereoselective Synthesis ◽  
High Stereoselectivity

Reaction of 1,3-dicarbonyls with α-hydrazinonitroalkenes leads to 2-hydrazino-2,3-dihydrofurans with high stereoselectivity in the presence of a tert-leucine derived squaramide and K2CO3 in aqueous THF.

Stereoselective synthesis of the C-11 to C-19 segment of macrolactin 3 via a center inversion followed by Oxa-Michael addition approach

2017 ◽  
Vol 36 (2-3) ◽  
pp. 100-110
Author(s):  
Prashanth Thodupunuri ◽  
Marumamula Hanumaiah ◽  
Shobanbabu Bommagani ◽  
Gangavaram V. M. Sharma
Keyword(s):  
Michael Addition ◽  
Stereoselective Synthesis

First Application of Ionic Liquid to Reactions Involving Organotellurium Compounds as Intermediates

2005 ◽  
Vol 2005 (7) ◽  
pp. 446-448 ◽  
Author(s):  
Lei Wang ◽  
Zhizhen Huang
Keyword(s):  
Ionic Liquid ◽  
High Purity ◽  
Stereoselective Synthesis ◽  
Condensation Reaction ◽  
Unsaturated Compounds ◽  
Novel Method ◽  
Ionic Solvent ◽  
Organotellurium Compounds ◽  
High Stereoselectivity

The condensation reaction of telluronium salts 1 with aldehydes and dibutyl telluride 4, bromide 5 with aldehyde 2 proceeded smoothly in the ionic solvent [bmim][BF4], affording a novel method for the stereoselective synthesis of (E)-α,β-unsaturated compounds 3 in high purity, excellent yields and high stereoselectivity.

ChemInform Abstract: Stereoselective Synthesis of cis-Decalins via Diels-Alder and Double Michael Addition of Substituted Nazarov Reagents.

ChemInform ◽  
2010 ◽  
Vol 24 (5) ◽  
pp. no-no
Author(s):  
J.-F. LAVALLEE ◽  
C. SPINO ◽  
R. RUEL ◽  
K. T. HOGAN ◽  
P. DESLONGCHAMPS
Keyword(s):  
Michael Addition ◽  
Stereoselective Synthesis ◽  
Diels Alder

Stereoselective synthesis of 2,3,4-highly substituted oxetanes by intramolecular C–C bond forming Michael addition

2016 ◽  
Vol 52 (81) ◽  
pp. 12108-12111 ◽  
Author(s):  
Guo-Ming Ho ◽  
Yu-Jang Li
Keyword(s):  
Michael Addition ◽  
Stereoselective Synthesis ◽  
Unsaturated Ester ◽  
Bond Forming

A wide variety of 2,3,3,4-tetrasubstituted oxetanes and 3-α,β-unsaturated ester substituted oxetanes were synthesized starting from vinylogous urethane derivatives.

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