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CAS No. : | 23788-74-1 | MDL No. : | MFCD00063233 |
Formula : | C13H18O5S | Boiling Point : | - |
Linear Structure Formula : | CH3C6H4SO3CH2C3H3O2(CH3)2 | InChI Key : | SRKDUHUULIWXFT-LLVKDONJSA-N |
M.W : | 286.34 | Pubchem ID : | 6993835 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
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* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium carbonate; In 1-methyl-pyrrolidin-2-one; hexane; ethyl acetate; | Step 2 To a solution of <strong>[89942-77-8]methyl <strong>[89942-77-8]3-hydroxy-2-nitrobenzoate</strong></strong> (1.97 g, 10 mmol) in N-methylpyrrolidinone (15 mL) was added (R)-2,2-dimethyl-1,3-dioxolan-4-ylmethyl p-tosylate (3.43 g, 1.2 eq.), and followed by K2CO3 (4.2 g, 3 eq.). After the mixture was heated at 96 C. overnight, was cooled to room temperature, quenched with H2O, and partitioned between H2O and EtOAc. The organic layer was separated, washed with H2O and NaCl (sat.), and then dried over Na2SO4. The crude product was purified on a silica gel column with 20% EtOAc in hexane to give methyl 3-((R)-2,2-dimethyl-1,3-dioxolan-4-ylmethyloxy)-2-nitrobenzoate as an oil (3.1 g). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
82% | With potassium carbonate; In N,N-dimethyl-formamide; at 70℃; for 96h; | 4-Hydroxypyridine-2,6-dicarboxylate (0.50g, 2.09mmol), (R)-2,2-Dimethyl-1,3-dioxolane-4-methanol p-toluenesulfonate (0.72g, 2.5mmol) and potassium carbonate (1.03g, 7.45mmol) were suspended in anhydrous DMF (20mL). The mixture was stirred at 70C for 96h, after which it was evaporated to dryness. The residue was dissolved in CH2Cl2 (100mL) and washed with water (100mL). The organic layer was dried with Na2SO4 and evaporated to dryness. The crude product thus obtained was purified on a silica gel column eluting with a mixture of MeOH and CH2Cl2 (6:94, v/v). Yield 0.61g (82%). 1H-NMR (400MHz, CDCl3): 7.77 (s, 2H, Pyr-H3 & -H5), 4.48 (m, 1H, dioxolane-H5), 4.43 (q, J=7.1, 4H, CO2CH2CH3), 4.20-4.09 (m, 3H, dioxolane-H4 & PyrOCH2), (dd, J=5.8, 8.6, 1H, dioxolane-H4), 1.42 (s, 3H, dioxolane-CH3), 1.41 (t, J=7.1, 6H, CO2CH2CH3), 1.36 (s, 3H, dioxolane-CH3). 13C-NMR (100MHz, CDCl3): 166.5 (2C, CONH2), 164.5 (Pyr-C4), 150.3 (2C, Pyr-C2 & -C6), 114.3 (2C, Pyr-C3 & -C5), 110.1 (dioxolane-C2), 73.4 (dioxolane-C5), 69.3 (PyrOCH2), 66.3 (dioxolane-C4), 62.3 (2C, CO2CH2CH3), 26.7 (dioxolane-CH3), 25.2 (dioxolane-CH3), 14.2 (2C, CO2CH2CH3). HR-ESI-MS: 354.1547 ([M+H]+, C17H24NO7+; calc. 354.1547). |
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