Synthesis of monosulphur and monoselenium analogues of psoralen
作者:Andreas E. Jakobs、Léon E. Christiaens、Marcel J. Renson
DOI:10.1016/s0040-4020(01)85508-3
日期:——
The synthesis of new, highly efficient DNA photoinactivating agents comprising an atom of sulfur or selenium in place of oxygen in the psoralen system is described.
Liquid crystalline bis(N-salicylideneaniline)s: synthesis and thermal behavior of constitutional isomers
作者:Uma S. Hiremath
DOI:10.1016/j.tetlet.2013.04.071
日期:2013.6
The first examples of mesogenic bis(N-salicylideneaniline)s (BSANs), wherein two lipophilic (half-disk shaped) entities are interlinked through the dihydroxydiformylbenzene core, were synthesized and characterized. In particular, three constitutional (positional) isomeric BSANs were prepared by the facile twofold condensation of 3,4,5-tris(alkoxy)anilines with 2,3-dihydroxyterephthalaldehyde, 4,6-
合成并表征了介晶双(N-水杨基苯胺)(BSAN)的第一个实例,其中两个亲脂性(半圆盘状)实体通过二羟基二甲酰基苯核相互连接。特别地,通过3,4,5-三(烷氧基)苯胺与2,3-二羟基对苯二甲醛,4,6-二羟基间苯二甲醛和2,5-二羟基对苯二甲醛的简便双缩合制备了三种结构(位置)异构BSAN。通过元素分析,FT-IR,1 H NMR和13建立了结构1 H NMR。质子NMR实验表明,它们仅以烯醇-亚胺(OH)形式存在。偏光光学显微镜,差示扫描量热法和粉末X射线衍射研究证明,在两组异构体中均出现了柱状的同构。
Synthesis of Benziporphyrins and Heterobenziporphyrins and an Assessment of the Diatropic Characteristics of the Protonated Species
作者:Timothy D. Lash、Ashley M. Toney、Kylie M. Castans、Gregory M. Ferrence
DOI:10.1021/jo401365p
日期:2013.9.20
, and further reaction with palladium(II) acetate gave stable organometallic derivatives. The X-ray crystal structure of a palladium(II) benziporphyrin showed that the system deviates significantly from planarity. Although the benzitripyrranes failed to give stable macrocyclic products with furan or thiophene dialdehydes, they afforded tetraphenyl heterobenziporphyrins upon reaction with diphenyl-substituted
Gold-catalyzed tandem reaction of 2-alkynylanilines followed by 1,6-conjugate addition to <i>p</i>-quinone methides: efficient access to unsymmetrical diarylindolylmethanes
作者:Raveendra Jillella、Dong hwan Oh、Chang Ho Oh
DOI:10.1039/c8nj03955k
日期:——
A simple, mild, efficient and chemoselective catalytic method for the straightforward synthesis of an interesting class of 2-aryl/alkyl-substituted-3-diaryl indolyl methanes in high yield is reported. This atom-efficient method proceeds via a gold-catalyzed one-pot sequential intramolecular hydroamination (C–N bond formation) of 2-alkynylanilines followed by a 1,6-conjugate addition to p-quinonemethides
2,4 and 2,5-bis(benzooxazol-2′-yl)hydroquinone (DHBO) and their borate complexes: synthesis and optical properties
作者:Karima Benelhadj、Julien Massue、Gilles Ulrich
DOI:10.1039/c6nj00113k
日期:——
2,4 and 2,5-bis(benzooxazol-2′-yl)hydroquinone (DHBO) scaffolds show fluorescence stemming from an ESIPT process but also act as chelates toward boron fragments.