Rapid synthesis of new discotic liquid crystals based on diquinoxalino[2,3-a:2′,3′-c]phenazine containing hexakis(alkoxy) side arms
作者:Chi Wi Ong、Su-Chih Liao、Tsu Hsing Chang、Hsiu-Fu Hsu
DOI:10.1016/s0040-4039(02)02862-9
日期:2003.2
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 (I) phase transitions. Importantly, the alkoxy substituted compound synthesized showed an M–I transition because of greater stability, whereas
1,2-双烷氧基-4,5-二氨基苯2a - e衍生物与新鲜制备的六酮环己烷的缩合反应可得到高收率的六(烷氧基)二喹喔啉[2,3- a:2',3'- c ]吩嗪。DSC和极化显微镜显示HATOC6既具有晶体(K)到中间相(M)的转变,又具有中间相(M)到各向同性(I)的转变。重要的是,合成的烷氧基取代的化合物由于具有更高的稳定性而显示出M–I过渡,而据报道的烷基硫醇在中间相后会分解。
Azolium-Linked Cyclophanes: Effects of Structure, Solvent, and Counteranions on Solution Conformation Behavior
作者:Murray V. Baker、David H. Brown、Charles H. Heath、Brian W. Skelton、Allan H. White、Charlotte C. Williams
DOI:10.1021/jo801860d
日期:2008.12.5
of some xylyl-linked imidazolium and benzimidazolium cyclophanes decorated with alkyl or alkoxy groups. The addition of alkyl/alkoxy chains to the cyclophanes allows for studies in chlorinated solvents, whereas previous solution studies of azolium cyclophanes have generally required highly polar solvents. The azolium cyclophanes may exist in a syn/syn conformation (azolium rings mutually syn, arene rings
申请人:AMOREPACIFIC CORPORATION (주)아모레퍼시픽(120060241378) Corp. No ▼ 110111-3471036BRN ▼106-86-43373
公开号:KR101684671B1
公开(公告)日:2016-12-09
본 발명은 신규한 퀴녹살린계 화합물, 그의 이성질체, 그의 전구약물, 또는 그의 약학적으로 허용 가능한 염, 수화물 또는 용매화물을 제공한다. 상기 퀴녹살린계 화합물은 UVA 및 UVC 영역의 자외선을 흡수할 수 있어서, 자외선 흡수제나, 노화방지용 약학조성물 또는 노화방지용 화장료 조성물로 유용하게 사용할 수 있다.