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CAS No. : | 207290-72-0 | MDL No. : | MFCD03425728 |
Formula : | C10H13NO2S | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | QGNLQHONMNFZJP-UHFFFAOYSA-N |
M.W : | 211.28 | Pubchem ID : | 2763540 |
Synonyms : |
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Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
* 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 |
---|---|---|
71% | Reflux | 5-Bromothiophene-2-carboxaldehyde was placed in a reactor, and water was added thereto. 4-Hydroxypiperidine (3 eq) was added to the reactor, and the mixture was stirred for tens of minutes or overnight under reflux. Immediately after completion of reaction, the reaction mixture was filtered through filter paper, and the filtrate was cooled for tens of minutes with a flow of water and then for several hours with ice. The precipitated crystals were recovered through filtration under suction and washed with cold water. The crystals were dried and dissolved in chloroform. The chloroform solution was dried over sodium sulfate anhydrate, and the dried solution was filtered through a silica gel pad. The filtrate was washed with chloroform until the color thereof became faint. The filtrate was concentrated under reduced pressure until the start of crystallization. n-Hexane was added to the mixture, and stirring was performed overnight at room temperature. The formed crystals were recovered through filtration, washed with n-hexane, and dried under reduced pressure, to thereby yield 5-(4-hydroxypiperidin-1-yl)-thiophene-2-carboxaldehyde. By use of 5-bromothiophene-2-carboxaldehyde (42.30 g) and 4-hydroxypiperidine (67.30 g), amine incorporation was performed according to Production Step 1, to thereby yield 5-(4-hydroxy-piperidin-1-yl)-thiophene-2-carboxaldehyde (yield: 33.00 g, 71percent). The thus-produced 5-(4-hydroxy-piperidin-1-yl)-thiophene-2-carboxaldehyde (10.56 g) and 3,4-dimethoxybenzyl cyanide (8.86 g) were subjected to condensation according to Production Step 2, to thereby yield (Z)-2-(3,4-dimethoxy-phenyl)-3-[5-(4-hydroxy-piperidin-1-yl)-thiophen-2-yl]-acrylonitrile (yield: 13.50 g, 73percent). The thus-produced (Z)-2-(3,4-dimethoxy-phenyl)-3-[5-(4-hydroxy-piperidin-1-yl)-thiophen-2-yl]-acrylonitrile (20.00 g) was dissolved in chloroform (650 mL), and the solution was reacted with pyridine (6.41 g) and bromoacetyl bromide (14.13 g) according to Production Step 3 (Method A), to thereby yield bromo-acetic acid 1-[5-[(Z)-2-cyano-2-(3,4-dimethoxy-phenyl)-vinyl]-thiophen-2-yl]-piperidin-4-yl ester (yield: 23.00 g, 87percent). The thus-produced bromo-acetic acid 1-[5-[(Z)-2-cyano-2-(3,4-dimethoxy-phenyl)-vinyl]-thiophen-2-yl]-piperidin-4-yl ester (2.30 g) was dissolved in chloroform (100 mL), and the solution was reacted with piperidine (533 mg) and triethylamine (658 mg) according to Production Step 4, to thereby yield the title compound (yield: 1.40 g, 60percent). |
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