Silylated polycarbonate polymers, method of making, and articles
申请人:Lens Jan Pleun
公开号:US20080306294A1
公开(公告)日:2008-12-11
A silylated dihydroxy aromatic compound of the formula (1a);
wherein G
a
and G
b
are each independently C
1-12
alkyl, —OSi(C
1-12
alkyl)
3
, C
1-12
arylalkyl, or —OSi(C
1-12
arylalkyl)
3
; Z
a
and Z
b
are each independently a straight or branched C
2-18
alkylene, a C
8-18
arylalkylene, or a C
8-18
alkylarylene, X
a
is a direct bond, a heteroatom-containing group, or a C
1-18
organic group, and r and s are each independently 1 or 2 is disclosed.
Aromatische sigmatropische Wasserstoffverschiebungen in 2-Vinyl- und 2-Allylphenolen
作者:Hans-J�rgen Hansen
DOI:10.1002/hlca.19770600624
日期:1977.9.21
Aromatic Sigmatropic Hydrogen-Shifts in 2-Vinyl- and 2-Allyl-phenols
2-乙烯基和2-烯丙基苯酚的芳香性向氢转移
Catalysis of the cyclohexadienone-phenol rearrangement by a Lewis-acidic clay system
作者:Stephane Chalais、Pierre Laszlo、Arthur Mathy
DOI:10.1016/s0040-4039(00)84602-x
日期:1986.1
The Fe3+-doped acidic K10 clay accelerates greatly, by factors of 105-106, the title reaction. These rearrangements thus occur in a few minutes at room temperature, according to [1,2] and [3,3] pathways.
The Claisen rearrangement of allyl phenyl ethers with exceptionally bulky, oxygenophilic methylaluminum bis(4-bromo-2,6-di-tert-butylphenoxide) (reagent A) is found to exhibit an unusual behavior not observable in the ordinary thermal and Lewis acid-induced rearrangement.
Allyl aryl ethers undergo accelerated Claisen and [1,3] rearrangements in the presence of a mixture of trialkylalanes and water or aluminoxanes. The ratio of ortho-, meta-, and para-Claisen products depends to a large extent on the presence of water and to a much lesser extent on the nature of the alane.