L-Xylose
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L-Xylose
structure -
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CAS No:
609-06-3
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Formula:
C5H10O5
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Chemical Name:
L-Xylose
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Synonyms:
L-Xylose;Xylose,L-;NSC 26213;141492-12-8
- Categories:
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CAS No:
Description
L-Xylose (L-(-)-Xylose) is the levo-isomer of Xylose. Xylose is classified as a monosaccharide of the aldopentose type[1].
Aldehydo-L-xylose is a xylose of ring-opened form having L-configuration.
Characteristics
98
-2.3
White to off-white Crystalline Powder
1.508 g/cm3
144 °C
333.2°C at 760 mmHg
219.2ºC
-20 ° (C=10, H2O)
H2O: within almost transparency;H2O: 0.1 g/mL, clear, colorless
Safety Information
3
36/37/38
24/25-36-26
Xi
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
H315
|Warning|H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]|P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, and P501|Aggregated GHS information provided by 6 companies from 2 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
L-Xylose Use and Manufacturing
Compound 9 (10.0 g, 31.42 mmol) was dissolved in 30percent sodium ethoxide solution (22.7 g, 126.3 mmol), and the mixture was stirred at 20-30 degrees for 2-5 hours, after concentrating the reaction solution, 30 ml of dichloromethane was added, ρΗ=7 was adjusted with 3N hydrochloric acid, the organic phase was separated and the aqueous phase was extracted three times with dichloromethane, dried the organic phase with anhydrous sodium sulfate, after separation of the solid, the organic phase was concentrated to give white crystals L-xylose (4.4 g, yield 92percent);Choline chloride (0.3 mol) and malonic acid (0.3 mol) were added to a mixture of L-(-) xylose (100 g, 666 mmol) and (110 ml, 1.5 mol) acetone under nitrogen atmosphere.The synthesized DES was refluxed for 40 minutes, cooled to room temperature, extracted with ethyl acetate three times (600 g/time), and ethyl acetate solution was concentrated under reduced pressure to give compound 2 (145.7 g, 95%); After washing, the washed material was vacuum-dried at 60 C for 55 minutes, and the recovery was continued for the next time.A mixture of in room temperature, A solution of magnesium sulfate (160 g, 1.33 mol) and concentrated sulfuric acid (9.9 mL, 190 mmol)(2S, 3R, 4S) -2, 3, 4, 5-tetrahydroxyvaler 1a (99.0 g, 659 mmol)In acetone (1.2 L)The resulting reaction was stirred for 12 hours.The reaction mixture was suction filtered, Washed with acetone (300 mL x 2)Combined filtrate, With 25% ammonia to adjust the pH to 7, Solid precipitated, filtered again and washed with acetone (150 mL x 2). The filtrate was combined, concentrated under reduced pressure, The title compound Ib was obtained as a yellow oil (128.0 g, 84.3%).: Synthesis of (2S, 3R, 4R, 5S)-2-[4-cyclopropyl-3-(2, 3-dihydro- benzo[1 , 4]dioxin-6-ylmethyl)-phenyl]-6-methylsulfanyl-tetrahydro-pyran-3, 4, 5-triol Step-I: To a stirred solution of
L-Xylose: ACTIVE
Computed Properties
Molecular Weight:150.13
XLogP3:-2.3
Hydrogen Bond Donor Count:4
Hydrogen Bond Acceptor Count:5
Rotatable Bond Count:4
Exact Mass:150.05282342
Monoisotopic Mass:150.05282342
Topological Polar Surface Area:98
Heavy Atom Count:10
Complexity:104
Defined Atom Stereocenter Count:3
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes
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