5942-30-3Relevant academic research and scientific papers
First total synthesis of mariamide A
Xia, Yamu,Chen, Chenglong,Li, Mengying,Zhou, Weizeng,Sun, Shuyu,Chu, Shanpeng,Wang, Hui
, p. 114 - 120 (2019/12/12)
Mariamide A, a lignanamide isolated from the seeds of Silybum marianum, has demonstrated potential utility as an antioxidant and antidiabetic agent and possesses an 8-O-4′ neolignan skeleton. Herein, a first total synthesis of mariamide A is presented that proceeds in nine steps using vanillin as the starting material. The key steps for the preparation of mariamide A involve an I2-catalyzed bromomethoxylation of an alkene group, a nucleophilic substitution followed by a sequential elimination and a monoacylation reaction.
Polymerizable liquid crystal compound, and optical antisotropic compsn.
-
Paragraph 0070, (2016/10/10)
The present description relates to a polymerizable liquid crystal compound, a polymerizable liquid crystal composition including the same, and an optically anisotropic body. The polymerizable liquid crystal compound includes a radical derived from the first liquid crystal molecule including a mesogen group having a non-aromatic ring; a radical derived from the second liquid crystal molecule including a mesogen group that has a structure different from said mesogen group having a non-aromatic ring and includes a ring containing a double bond; and a linker that has a specific structure and links the sp3-hybridized carbon in the non-aromatic ring of the radical derived from the first liquid crystal molecule and the sp2-hybridized carbon in the mesogen group of the radical derived from the second liquid crystal molecule, wherein at least one of the radicals derived from the first and the second liquid crystal molecules may include one or more polymerizable groups which are connected to the mesogen group directly or via spacer groups. Such polymerizable liquid crystal compound makes it possible to exhibit stable reverse wavelength dispersion solely or by being mixed with other liquid crystal materials.
A One-Step Conversion of p-Methoxybenzyl Ethers into Methoxymethyl Ethers by the Action of Dimethoxymethane in the Presence of Tin(II) Bromide and Bromomethyl Methyl Ether
Oriyama, Takeshi,Kimura, Mikio,Koga, Gen
, p. 885 - 887 (2007/10/02)
The combined use of dimethoxymethane with catalytic amounts of tin(II) bromide and bromomethyl methyl ether cleaves p-methoxybenzyl ethers to give methoxymethyl ethers in good yields.The chemoselective conversion of p-methoxybenzyl ethers in the presence of the benzyl ether function into methoxymethyl ethers has also occurred successfully.
Prediction of the Absolute Configuration of Optically Active Pheromones Using Liquid Crystals
Ikemoto, Tetsuya,Mitsuhashi, Kazuhiro,Mori, Kenji
, p. 687 - 694 (2007/10/02)
Prediction of the absolute configuration of optically active methyl branched pheromones is possible by combining them with mesogens to give them liquid crystalline properties and measuring the helical senses of the chiral nematic phases.
