The13C NMR characterization of some 1,2,3,4-tetrahydro-1,4-ethanonaphthalenes
摘要:
AbstractThe 2‐hydroxy and 2‐hydroxy‐3‐methyl isomers of 5,8‐dimethoxy‐1,2,3,4‐tetrahydro‐1,4‐ethanonapthalene have been characterized by 13C NMR with the aid of lanthanide shift reagents. A definite interaction with a syn oxygen, presumably with the lone electron pairs, and the aromatic carbon 8a has been established. This n‐π γ‐effect is not found with a corresponding methyl group. Examples from the literature also evidence the reality of the γ‐effect, which provides a useful structure assignment tool.
Methyl substituent effects on electrophilic additions to some benzobicyclooctadienes
作者:William B. Smith、Bradley D. Mercer
DOI:10.1021/jo00236a025
日期:1988.1
SMITH, WILLIAM B.;MERCER, BRADLEY D., J. ORG. CHEM., 53,(1988) N 1, 126-129
作者:SMITH, WILLIAM B.、MERCER, BRADLEY D.
DOI:——
日期:——
Semidiones. VI. Bicyclo[2.2.2]octane-2,3-semidione and derivatives
作者:Glen Allan. Russell、George W. Holland、Kuo-Yuan. Chang
DOI:10.1021/ja01001a041
日期:1967.12
The13C NMR characterization of some 1,2,3,4-tetrahydro-1,4-ethanonaphthalenes
作者:William B. Smith
DOI:10.1002/omr.1270211108
日期:1983.11
AbstractThe 2‐hydroxy and 2‐hydroxy‐3‐methyl isomers of 5,8‐dimethoxy‐1,2,3,4‐tetrahydro‐1,4‐ethanonapthalene have been characterized by 13C NMR with the aid of lanthanide shift reagents. A definite interaction with a syn oxygen, presumably with the lone electron pairs, and the aromatic carbon 8a has been established. This n‐π γ‐effect is not found with a corresponding methyl group. Examples from the literature also evidence the reality of the γ‐effect, which provides a useful structure assignment tool.