High diastereoselection in the alkylation of siloxy-substituted methyl cyclopropanecarboxylates: consequence of a pyramidal ester enolate anion?

1982 ◽  
Vol 104 (6) ◽  
pp. 1735-1737 ◽  
Author(s):  
Hans Ulrich Reissig ◽  
Ingrid Boehm
Keyword(s):  
Enolate Anion ◽  
Ester Enolate

A NOVEL METHOD FOR THE GENERATION OF AN ESTER ENOLATE ANION FROM ETHOXYACETYLENE

1981 ◽  
Vol 10 (8) ◽  
pp. 1129-1132 ◽  
Author(s):  
Teruaki Mukaiyama ◽  
Masahiro Murakami
Keyword(s):  
Enolate Anion ◽  
Novel Method ◽  
Ester Enolate

scholarly journals Theoretical Electronic and Rovibrational Studies for Anions of Interest to the DIBs

2013 ◽  
Vol 9 (S297) ◽  
pp. 344-348 ◽  
Author(s):  
R. C. Fortenberry
Keyword(s):  
Excited State ◽  
Excited States ◽  
State Of The Art ◽  
Spectroscopic Constants ◽  
Coupled Cluster ◽  
Electronic Excitations ◽  
Electronically Excited States ◽  
Coupled Cluster Theory ◽  
Electronically Excited ◽  
Enolate Anion

AbstractThe dipole-bound excited state of the methylene nitrile anion (CH2CN−) has been suggested as a candidate carrier for a diffuse interstellar band (DIB) at 803.8 nm. Its corresponding radical has been detected in the interstellar medium (ISM), making the existence for the anion possible. This work applies state-of-the-art ab initio methods such as coupled cluster theory to reproduce accurately the electronic excitations for CH2CN− and the similar methylene enolate anion, CH2CHO−. This same approach has been employed to indicate that 19 other anions may possess electronically excited states, five of which are valence in nature. Concurrently, in order to assist in the detection of these anions in the ISM, work has also been directed towards predicting vibrational frequencies and spectroscopic constants for these anions through the use of quartic force fields (QFFs). Theoretical rovibrational work on anions has thus far included studies of CH2CN−, C3H−, and is currently ongoing for similar systems.

Highly Stereocontrolled Construction of 3-Alkoxyazetidin-2-ones Using Ester Enolate-Imine Condensation

1994 ◽  
Vol 23 (8) ◽  
pp. 1403-1406 ◽  
Author(s):  
Makoto Shimizu ◽  
Takenori Ishida ◽  
Tamotsu Fujisawa
Keyword(s):  
Ester Enolate
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