Flavoring substance for cigarettes, method for preparing flavoring substance and application thereof
A flavoring substance and technology for cigarettes, which is applied in the field of daily chemical industry, can solve the problems of decreased taste, small molecular weight, and large irritation, and achieve the effects of soft and transparent smoke, mellow aftertaste, and improved taste
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Embodiment 1
[0019] Preparation of Bromotetraisovaleryl Glucose Ester
[0020]
[0021] Put 0.5mol dry D-glucose into a 500mL round-bottom three-neck flask, add 300m methylene chloride to it, stir and mix evenly, add 3mol isovaleryl chloride and continue stirring for 0.5h, then add 3mol of pyridine dropwise, and continue the reaction for 6h , a brownish-yellow solution was obtained. Pour the reaction solution into a beaker filled with 250 mL of ice water, and stir for about 3 hours. The bottom layer of the beaker gradually becomes viscous, and white crystals gradually precipitate out. The upper liquid was removed, and the crystals were washed with cold water to collect the crystalline compound. The collected compound was dissolved in 300ml of dichloromethane, and the mass percent concentration of 150ml of HBr was added dropwise at 0°C as a 33% HBr acetic acid solution, after the addition was completed, it was raised to room temperature and reacted overnight, poured into a container con...
Embodiment 2
[0023] Preparation of 3-oxo-α-ionol-2,3,4,6-tetra-O-isovaleryl-β-D-glucopyranoside
[0024]
[0025] Bromotetraisovalerylglucose ester (3g, 5mmol), 3-oxo-α-ionol 5mmol were dissolved in a mixed solvent of 25ml toluene and 5ml ether, after adding Ag 2 CO 3 (3.32g, 12mmol) was stirred at reflux for 12.5 hours. The reaction mixture was washed with saturated NaHCO 3 aqueous solution. use CH 2 Cl 2 extraction. The extract was washed with brine and then with MgSO 4 dry. Removal of the solvent gave a residue which was subjected to column chromatography eluting with hexane-ether (2:1) to give the substrate in 80% yield. 1 H NMR (501MHz, CDCl 3 )δ5.77(S,1H),5.70(d,J=8.3Hz,1H),5.59(d,J=9.4Hz,1H),5.54~4.65(m,5H),4.31(d,J=12.5 ,2H),3.76(m,1H),2.80~2.86(m,3H),2,45~2.50(m,4H),2.14~2.27(m,8H),1.71(S,3H),1.31(d , J=8.3Hz, 3H), 0.96~1.2(m, 30H).
Embodiment 3
[0027] A formulation of electronic cigarette liquid containing 3-oxo-α-ionol-2,3,4,6-tetra-O-isovaleryl-β-D-glucopyranoside
[0028] The formula is prepared from the following components in mass percentage:
[0029]
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