Abstract
A number of chiral trioxabicyclo[4.4.0]decanes and boratrioxabicyclo[4.4.0]decanes have been prepared. The mesogenic properties of these compounds have been studied. They show short cholesteric pitch, blue phases and TGBA phases depending on the chain length of the n-alkyl substituent, with quite large differences between the trioxa- and the boratrioxaderivatives.
References
1.
(a)
Vill V.
,
Tunger H.-W.
,
Stegemeyer H.
and
Diekmann K.
, Tetrahedron: Asymmetry , 1994 , 5 , 2443 –2446
2.
Vill V.
and
Tunger H.W.
, Liebigs Ann. , 1995 , 1055 –1059
3.
Vill V.
and
Tunger H.-W.
, J. Chem. Soc., Chem. Commun. , 1995 , 1047 –1048
4.
Vill V.
and
Tunger H.-W.
, Liq. Cryst. 1996 , 20 , 449 –452
5.
Vill V.
,
Tunger H.-W.
and
von Minden H.M.
, J. Mater. Chem. , 1996 , 6 , 739 –745
6.
Vill V.
,
Tunger H.-W
and
Peters D.
, Liq. Cryst. , 1996 , 20 , 547 –552
7.
Vill V.
,
von Minden H.M.
and
Bruce D.W.
, J. Mater. Chem. , 1997 , 7 , 893 –899 .
8.
(a)
Bertini B.
,
Moineau C.
,
Sinou D.
,
Gesekus G.
and
Vill V.
, Eur. J. Org. Chem. , 2001 , 375 –381
9.
Bertini B.
,
Moineau C.
,
Sinou D.
and
Vill V.
, J. Carbohydr. Chem. , in press.
10.
Moineau C.
,
Bolitt V.
and
Sinou D.
, J. Org. Chem. , 1998 , 63 , 582 –591 .