Claisen rearrangement of meta-substituted allyl phenyl ethers
作者:J. Malcolm Bruce、Yusuf Roshan-Ali
DOI:10.1039/p19810002677
日期:——
Electron-releasing substituents at the 3-position of allylphenylethers favour Claisenrearrangement of the allyl group to the 6-position, whereas electron-acceptors favour migration to the 2-position. 2-Acylhydroquinone 4-allyl ethers yield, predominantly, the 3-allyl isomers, probably because internal hydrogen bonding confers naphthalenoid character on the aryl residue.
Regioselectivity in Aromatic Claisen Rearrangements
作者:Fábio Cesar Gozzo、Sergio Antonio Fernandes、Denise Cristina Rodrigues、Marcos Nogueira Eberlin、Anita Jocelyne Marsaioli
DOI:10.1021/jo026385g
日期:2003.7.1
eight meta-substituted allyl aryl ethers confirm the reliability of a new (1)H NMR methodology used to predict aromatic Claisen regioselectivity from ground-state conformational preference of the reactant allyloxy group. Frontier HOMO-LUMO intramolecular orbital interactions, a classical approach in predicting reactivity and selectivity for Claisenrearrangements of allylvinylethers, is shown to fail
Compounds and Methods for the Treatment of Viruses and Cancer
申请人:Jorgensen William L.
公开号:US20100222352A1
公开(公告)日:2010-09-02
The present invention relates to compounds according to the formula I: Where R
a
is H or an optionally OH-substituted C
1
-C
3
alkyl; R
1
is OR
1
, an optionally substituted C
4-12
carbocyclic group which may be saturated or unsaturated (including aromatic) or an optionally substituted heterocyclic group; R
1
is an optionally substituted C
1
-C
14
hydrocarbyl group or an optionally substituted heterocyclic group; R
2
, R
3
and R
4
are each independently H, an optionally substituted C
1
-C
4
alkyl group (preferably CH
3
, CH
2
CH
3
or CF
3
), halogen (preferably F, Cl, Br), OR, CN, NO
2
, a C
1
-C
6
thioether, a C
1
-C
6
thioester group, an optionally substituted CO
2
R group, an optionally substituted COR group or an optionally substituted OCOR group (preferably R
4
is H); R is H or an optionally substituted C
1
-C
6
alkyl group; RHET is an optionally substituted heterocyclic group; and pharmaceutically acceptable salts, solvates or polymorphs thereof.