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Structure of 790667-45-7

Chemical Structure| 790667-45-7

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Product Details of [ 790667-45-7 ]

CAS No. :790667-45-7
Formula : C6H12ClNO
M.W : 149.62
SMILES Code : O=C1C[C@H](C)NCC1.Cl
MDL No. :MFCD22682260
InChI Key :ACXLFVKOKDSUOU-JEDNCBNOSA-N
Pubchem ID :67980815

Safety of [ 790667-45-7 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H315-H319-H335
Precautionary Statements:P261-P305+P351+P338

Application In Synthesis of [ 790667-45-7 ]

* 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.

  • Downstream synthetic route of [ 790667-45-7 ]

[ 790667-45-7 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 790667-45-7 ]
  • [ 24424-99-5 ]
  • [ 790667-49-1 ]
YieldReaction ConditionsOperation in experiment
95% With sodium hydrogencarbonate; In dichloromethane; water; at 20℃; Dissolve 2-Methyl-4-piperidinone hydrochloride (200 g, estimated 1.2855 mole free base content) in water (500 ml). Add the solution to a mixture of methylene dichloride (1 L) and aqueous NAHC03 (180 g in 1.2 L water) at room temperature. Add a solution of di-tert-butyl dicarbonate (280 g, 1.28 mole) in methylene dichloride (500 ML) and stir the reaction mixture overnight at 20C. Separate the water layer and extract twice with methylene dichloride (500ml). Combine the organic layers, wash with water (500 ML), dry over MGS04 (60 g), filter and concentrate under vacuum (276.5 g as red oil). Dissolve the oil in cyclohexane (1 L) and plug-filter through silicagel (300 g). Elute the silicagel with cyclohexane (2L) and 50/50 CYCLOHEXANE/ETHYL acetate (1L). Concentrate the filtrates under vacuum to obtain the title compound as a yellow residue (261 g, 95). Alternatively, N-TERT-BUTYLOXYCARBONYL-2-S-METHYL-4-PIPERIDINONE is prepared in a one-pot synthesis from N- (S)-L-PHENYIETHYI-2-S-METHYI-4-PIPERIDINONE as follows: Dissolve N- (S)-L-PHENYLETHYL-2-S-METHYL-4-PIPERIDINONE (200 g, 0.9208 mole) in THF (200 ml), Add a solution OF DI-TERI-BUTYL DICARBONATE (214. 7g, 0.9838 mole) in THF (200 ML). Place the reaction mixture under a nitrogen flow and add PD/C (10% content, dry catalyst, 10 g). Pressurize the reactor three times with N2, followed by three times with H2. Heat the reaction mixture to 50C and hydrogenate overnight with STIRRING (3 bar H2, ~43. 5 PSI,-300KPA, 300 rpm). Determine the end of the reaction by TLC analysis (silica plate, CYCLOHEXANE/ETHYLACETATE 50/50, complete disappearance of the starting product). Cool the reaction mixture to room temperature and purge the reator by pressurizing three times with N2. Filter off the catalyst using a celite pad and wash with THF (200 ML). Remove the solvent by evaporation (40C, vacuum) to obtain the crude product as a yellow oil (183.5 gram, 93%). Dissolve the crude product in n-hexane (200 ML) and stir overnight at 20C. Filter off the solid, wash with n-hexane (50 ML), and dry under vacuum at 20C to obtain the title compound (78 g, 39%). Concentrate the mother liquors under vacuum to 140 g residual. Cool the solution and stir overnight at 20C. Cool the resulting suspension to 5C and stir for 15 minutes. Filter off the solid, wash with n-hexane (20M1) and dry under vacuum at 20C to obtain additional title compound (30.6 g, 15%).
 

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