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CAS No. : | 40834-42-2 | MDL No. : | MFCD07782086 |
Formula : | C5H6O3 | Boiling Point : | 328.1°C at 760 mmHg |
Linear Structure Formula : | - | InChI Key : | - |
M.W : | 114.10 | Pubchem ID : | 115301 |
Synonyms : |
|
TPSA :Topological Polar Surface Area | 46.5 | H-Bond Acceptor Count : | 3 |
XLogP3 : | -0.4 | H-Bond Donor Count : | 1 |
SP3 : | 0.40 | Rotatable Bond Count : | 0 |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P280-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H332-H335 | Packing Group: | N/A |
GHS Pictogram: |
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Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60% | With lithium tri-t-butoxyaluminum hydride In tetrahydrofuran at -30 - -15℃; for 3.00 h; Inert atmosphere | A solution of 5.34 g LiAlH(t-BuO)3 (21.00 mmol) in 40 cm3 anhydrous THF was added dropwise over a 30-min period to a solution of 1.68 g citraconic anhydride (6, 15.00 mmol) in 50 cm3 anhydrous THF under a nitrogen atmosphere at - 30 C. The temperature was maintained at - 15 C for 3 h and then the reaction mixture was warmed to ambient temperature. The reaction was quenched with 50 cm3 1 M HCl, the solution was saturated with NaCl, the crude product was extracted with EtOAc (3 9 50 cm3), and the combined organic fraction was dried over MgSO4. The solvent was removed in vacuo. Purification by column chromatography (SiO2, 20percent AcOEt in petroleum ether) afforded 7a (1.023 g,60percent) and 7b (116 mg, 7percent) as yellow oils. TLC: Rf = 0.16 (for 7a), 0.15 (for 7b) (20percent AcOEt in petroleum ether). 7a: 1H NMR (400 MHz, acetone-d6): d = 6.67 (bs, 1H),6.02 (bs, 1H), 5.87 (p, J = 1.5 Hz, 1H), 2.08 (d,J = 1.5 Hz, 3H) ppm; 13C NMR (100 MHz, acetone-d6):d = 171.30 ([C\), 166.65 ([C\), 118.68 (CH), 100.25(CH), 13.15 (CH3) ppm; MS (EI): m/z (percent) = 114.0 ([M?],2), 113.0 (7), 86.0 (61), 85.0 (13), 69.0 (100), 68.0 (82),41.1 (50), 40.1 (65), 39.1 (93). |
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