106161-14-2Relevant academic research and scientific papers
The effect of the position of chiral (?)-menthyl on the formation of blue phase and mesophase behavior in biphenyl-benzoate liquid crystals
Chen, Zhang-Pei,Wang, Xin-Jiao,Meng, Ling-Xin,Wang, Ji-Wei,Jia, Ying-Gang
, (2019/11/26)
Eight new chiral liquid crystal compounds 4-(4-menthyloxy-n-oxoalkanoyloxy) biphenyl-4′-yl 4-butoxybenzoates MnB4OB (n = 1–8), were prepared by modifying the position of chiral (?)-menthyl in the menthol based liquid crystal compounds through gradually increasing the alkyl chain length of the dicarboxylic spacer. All compounds were characterized by FT-IR and NMR spectroscopy in order to prove their chemical structures. Differential scanning calorimetry (DSC), polarized optical microscopy (POM) and X-ray diffraction were carried out to systematically investigate their phase transition behaviors. The position of chiral (?)-menthyl in relation to the core has a great effect on the formation of BPs and mesomorphic behaviors. Only CLCs M1B4OB and M2B4OB with short spacer chains presented blue phases. Furthermore, the length and parity of the flexible spacers have a profound influence on phase structures and phase transition behaviors. An odd-even effect is observed for these chiral liquid crystal compounds.
DIESTER COMPOUND AS PERFUME PRECURSOR
-
Paragraph 0047-0052, (2020/08/12)
PROBLEM TO BE SOLVED: To provide a new diester compound usable as a perfume precursor. SOLUTION: There are provided: a diester compound which has a cyclohexanol or a derivative thereof, an aroma compound having a hydroxy group, and a diester bond connecting these two compounds in a molecule, and is usable as a perfume precursor; a perfume composition containing the same; and a consumption article containing the diester compound or the perfume composition. There is also provided a method for imparting or enhancing residual perfume of the consumption article, which comprises formulating the diester compound or the perfume composition into the consumption article. SELECTED DRAWING: None COPYRIGHT: (C)2020,JPOandINPIT
Synthetic routes to the stereoisomers of 2,4-dimethylpentane-1,5-diol derivatives
Mas, Gemma,González, Llu?sa,Vilarrasa, Jaume
, p. 8805 - 8809 (2007/10/03)
Five different routes to every stereoisomer of non-symmetric derivatives of 2,4-dimethylpentanedioic acid and/or of O-monoprotected 2,4-dimethylpentane- 1,5-diols, which are common building blocks for the total synthesis of many polypropionates, have been investigated. Alkylation of the lithium enolate of N-propanoylpseudoephedrine turned out to be the most appropriate method, in connection with the synthesis of fragment C1-C5 of amphidinolide K.
