A Building Block Method for the Synthesis of Higher Cycloamides
摘要:
Series of cyclic amides containing optically active helicene, (P)-1, 12-dimethylbenzo[c]phenanthrene, are synthesized using a building block method. The building block consists of one (P)-helicene unit and one dianiline unit with its amino-terminal-protected with benzyloxycarbonyl and its acid terminal activated as acid chloride. The coupling with (P,P....)-[(n - 3) + (n - 2)]diamine followed by deprotection gives (P,P....)-[(n - 1) + n]diamine, which possesses n - 1 parts of (P)-helicene and n parts of dianiline. Cyclization of the (PP....)-[(n - 1) + n]diamine with helicenediacid dichloride gives (P,P....)-[n + n]cycloamide. All the members of (P,P)-[2 + 2]cycloamide to (P,P,P,P,P,P,P,P,P,P)-[10 + 10]cycloamide are synthesized using this method, and are compared spectroscopically.
Synthesis and monolayer behaviors of optically active 1,12- dimethylbenzo[c]phenanthrene-5,8-diamides and the formation of chiral langmuir-blodgett films
previously reported that an optically active cyclic amide consisting of a helicalchiral1,12-dimethylbenzo[c]phenanthrene-5, 8-dicarboxylic acid forms a stable monolayer on the water surface, and that the monolayer can be transferred on a solid support giving optically active Langmuir-Blodgett (LB) films. In this study, several related amides were synthesized, and their monolayer behaviors were investigated
我们以前曾报道过,由螺旋手性1,12-二甲基苯并[ c ]菲-5,8-二羧酸组成的旋光环状酰胺在水表面形成稳定的单层,并且该单层可以转移到固体载体上得到光学活性的朗缪尔-布洛杰特(LB)膜。在这项研究中,合成了几种相关的酰胺,并对其单层行为进行了研究,以期制备具有官能团的光学活性LB膜。结果表明,环状酰胺结构和环己基部分对于在水表面形成稳定的单分子层至关重要。仲酰胺的N-烷基化不会严重影响单层的形成,而手性LB膜可通过N,N获得环酰胺的-双(3-巯基丙基)衍生物。
Ferroelectric Alkylamide-Substituted Helicene Derivative with Two-Dimensional Hydrogen-Bonding Lamellar Phase
liquid crystallinity for the optically active derivative because of the different molecular assemblystructure. The racemic phase is constructed through a two-dimensional (2D) N-H···O═ hydrogen-bonding network, which shows ferroelectric P- E hysteresis curves at above 340 K. The collective dipole inversion in the 2D layer contributes to the ferroelectricity in the lamellar phase. The remanent polarization
Synthesis of optically active macrocycles consisting of helical chiral unit 1,12-dimethylbenzo[c]phenanthrene-5,8-dicarboxylate as a novel chiral building block
Optically pure 1,12-dimethylbenzo[c]phenanthrene-5,8-dicarboxylic acid 1 is prepared in gram quantities, and a series of macrocycles consisting of the helical chiral unit are synthesized.
Helical chiral 1,12-dimethylbenzo[c]phenanthrene-5,8-dicarboxylic acid was synthesized and resolved in multigram quantities. The absolute configuration was determined by X-ray analysis of the bis(camphorsultamamide) derivative. A series of optically active macrocyclic amides consisting of the chiral unit and a dianiline spacer were synthesized by one-pot procedures, and their structures were compared by spectroscopy and X-ray crystallography. One of the cycloamides exhibited catalytic activity in the asymmetric addition of diethylzinc to aromatic aldehydes. N-Alkylated derivatives were also synthesized, which possessed folded structures distinct from those of the parent cyclic amides.
Cyclic Anhydrides Formed from 1,12-Dimethylbenzo[c]phenanthrene-5,8-dicarboxylic Acid and1,3-Benzene-dicarboxylic Acids