Rapid synthesis of new discotic liquid crystals based on diquinoxalino[2,3-a:2′,3′-c]phenazine containing hexakis(alkoxy) side arms

被引：50
|
作者：
Ong, CW [1 ]
Liao, SC
Chang, TH
Hsu, HF
机构：
[1] Natl Sun Yat Sen Univ, Dept Chem, Kaohsiung 804, Taiwan
[2] Tamkang Univ, Dept Chem, Tamsui 251, Taiwan
来源：
TETRAHEDRON LETTERS | 2003年 / 44卷 / 07期
关键词：
D O I：
10.1016/S0040-4039(02)02862-9
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
The condensation of 1,2-bisalkoxy-4,5-diaminobenzene 2a-e derivatives with freshly prepared hexaketocyclohexane give hexakis(alkoxy)diquinoxalino[2,3-a:2',3'-c]phenazines in good yield. DSC and polarization microscopy showed HATOC6 has both the crystalline (K) to mesophase (M) and the mesophase (M) to isotropic (1) phase transitions. Importantly, the alkoxy substituted compound synthesized showed an M-I transition because of greater stability, whereas the reported alkyl-thiol decomposes after the mesophase. (C) 2003 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1477 / 1480
页数：4
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