77304-35-9Relevant 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
, (2020)
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.
A L-menthyl-N, N-dimethyl succinic amide new synthesis method
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Paragraph 0032-0033; 0039, (2017/02/28)
The invention discloses a novel synthesis method for L-menthyl-N,N-dimethyl succinamide. The method specifically comprises the following steps: adding L-mono-methyl succinate, DMF (Dimethyl Formamide) and dichloromethane into a dry four-mouth flask with a thermometer, a backflow condensing tube and a tail gas recycling device, under the condition of stirring, dropping a triphosgene solution to perform acylating chlorination reaction, dropping methanol into prepared menthyl succinic acid mono acyl chloride at low temperature to perform esterification reaction, dropping a dimethylamine solution into the prepared methyl succinic acid menthyl acetate for reaction at low temperature, adding water, stirring, standing to layer, collecting the organic phase, washing the organic phase till being neutral, depressurizing to distill so as to obtain a product, namely, L-menthyl-N,N-dimethyl succinamide. The yield of the product is 75.4%, and the product is a faint yellow liquid with the purity of 99.0%. By using the method, the purity and the yield of the product are improved, a small amount of byproducts are produced, the aftertreatment is easy to carry out, a small deal of industrial waste is generated, the production cost is lowered, and large-scale production application in industry is achieved.
COOLING SENSATION AGENT COMPOSITION, SENSORY STIMULATION AGENT COMPOSITION AND USE OF THE SAME
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Page/Page column 10-11, (2011/04/24)
Disclosed is a cooling sensation agent composition or sensory stimulation agent composition which contains at least one of diester compounds of dicarboxylic acid represented by the formula (1) wherein A represents CH2 or CH═CH, n represents an integer of 0 to 4 when A is CH2, or 1 when A is CH═CH, B is an alcohol residue having 10 to 18 carbon atoms and containing a para-menthane skeleton, which may have a substituent, and C is an alcohol residue having 6 to 18 carbon atoms, which may have a substituent as well as a flavor or fragrance composition, a beverage, a food product, a perfume or cosmetic product, a toiletry product, daily utensil products or groceries, a fiber, a fiber product, clothes, clothing or a medicine, wherein the cooling sensation agent composition or the sensory stimulation agent composition is compounded.
