Remote Substituent Effect Favoring the Formation of syn-Adducts in the Chelation Controlled Radical Reactions of γ-Benzyloxy-α-methylenecarboxylic Acid Esters.

ChemInform ◽  
2003 ◽  
Vol 34 (37) ◽  
Author(s):  
Hajime Nagano ◽  
Hisako Ohkouchi ◽  
Tomoko Yajima
Keyword(s):  
Substituent Effect ◽  
Radical Reactions ◽  
Remote Substituent ◽  
Acid Esters

scholarly journals Terminal Trialkylsilyl Substituent Effect of Janus-type Molecular Tubes on the Inclusion of Unsaturated Fatty Acid Esters

ACS Omega ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 3227-3231
Author(s):  
Chizuru Kogame-Asahara ◽  
Hitomi Iguchi ◽  
Kenichiro Honda ◽  
Hajime Shigemitsu ◽  
Toshiyuki Kida
Keyword(s):  
Fatty Acid ◽  
Unsaturated Fatty Acid ◽  
Substituent Effect ◽  
Fatty Acid Esters ◽  
Molecular Tubes ◽  
Acid Esters

scholarly journals Photochemical Transformation of some 3-benzyloxy-2-(benzo[b]thiophen-2-yl)-4Hchromen-4-ones: A Remote Substituent Effect

2018 ◽  
Vol 16 (1) ◽  
pp. 79-86
Author(s):  
Aarti Dalal ◽  
Radhika Khanna ◽  
Ramesh C. Kamboj
Keyword(s):  
Substituent Effect ◽  
Product Yield ◽  
Photochemical Transformation ◽  
Spectroscopic Techniques ◽  
Reaction Site ◽  
State Switching ◽  
Photochemical Transformations ◽  
Remote Substituent ◽  
Electron Donating Groups

AbstractThe effect on photochemical transformations of the substituents present remotely from the reaction site in 3-benzyloxy-2-(benzo[b]thiophen-2-yl)-4H-chromen-4-ones has been determined. The structure(s) of the substrates and photoproducts were established by spectroscopic techniques (UV, IR, and NMR). The substituents had profound effects on product yield and distribution. Electron withdrawing groups (EWGs) on the benzenoid moiety of the chromenone nucleus increased the yield of the photoproducts whereas electron donating groups (EDGs) decreased the yield. These results may be attributed to “state switching” of the substituents during excitation.

Conformational Studies by Dynamic NMR. 95.1Rotation around the Adamantyl−Alkyl Bond. Remote Substituent Effect on Conformational Equilibrium

2003 ◽  
Vol 68 (22) ◽  
pp. 8494-8499 ◽  
Author(s):  
J. Edgar Anderson ◽  
Armin de Meijere ◽  
Sergei I. Kozhushkov ◽  
Lodovico Lunazzi ◽  
Andrea Mazzanti
Keyword(s):  
Substituent Effect ◽  
Conformational Equilibrium ◽  
Dynamic Nmr ◽  
Conformational Studies ◽  
Remote Substituent
Sign in / Sign up

Export Citation Format

Share Document