Long-range substituent effects on the regioselectivity of one-carbon ring expansion of norbornan-7-ones

1993 ◽  
pp. 1727 ◽  
Author(s):  
Goverdhan Mehta ◽  
Faiz Ahmed Khan
Keyword(s):  
Long Range ◽  
Substituent Effects ◽  
Ring Expansion ◽  
Carbon Ring

Long range substituent effects relfected in the13C NMR spectra of allyl alcohols and their derivatives

1975 ◽  
Vol 7 (1) ◽  
pp. 51-53 ◽  
Author(s):  
Ernest Wenkert ◽  
Miroslav J. Gašić ◽  
Edward W. Hagaman ◽  
L. D. Kwart
Keyword(s):  
Long Range ◽  
Nmr Spectra ◽  
Substituent Effects ◽  
Allyl Alcohols

The chemistry of Lauren-1-ene. III. Synthesis and properties of laurenane and 1βH-Lamenane

1981 ◽  
Vol 34 (6) ◽  
pp. 1303 ◽  
Author(s):  
PJ Eaton ◽  
DR Lauren ◽  
AW O'Conner ◽  
RT Weavers
Keyword(s):  
Long Range ◽  
Substituent Effects ◽  
Conformational Mobility ◽  
Saturated Hydrocarbons ◽  
Lanthanide Shift Reagents ◽  
Shift Reagents

The saturated hydrocarbons laurenane (3) and 1βH-laurenane (4) have been synthesized. Assignments of their 13C n.m.r. and 1H n.m.r. spectra are reported and used, with the aid of lanthanide shift reagents, to investigate conformational mobility of these substituted fenestranes. Some examples of long-range 13C n.m.r. substituent effects of the ε and ζ types have been noted.

Proton magnetic resonance spectra of some benzo[b]thiophens. An investigation of substituent effects in a heteroaromatic system

1968 ◽  
Vol 21 (7) ◽  
pp. 1853 ◽  
Author(s):  
B Caddy ◽  
M Martin-Smith ◽  
RK Norris ◽  
ST Reid ◽  
S Sternhell
Keyword(s):  
Magnetic Resonance ◽  
Long Range ◽  
Proton Magnetic Resonance ◽  
Chemical Shifts ◽  
Substituent Effects ◽  
Spin Coupling ◽  
Heteroaromatic System ◽  
Spin Spin Coupling ◽  
Magnetic Resonance Spectra

N.m.r. data for 19 5-substituted and 13 polysubstituted benzo[b]thiophens are tabulated. The influence of the substituents at C5 on the chemical shifts of H4 and H6 is discussed. Long-range interproton spin-spin coupling between H3 and H7, and between H2 and H6, is general in benzo[b]thiophens. The vicinal coupling J6,7 in 5-substituted benzo[b]thiophens varies directly and linearly with the electronegativity of the substituents at C5.

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