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Chemical Structure| 97592-20-6 Chemical Structure| 97592-20-6

Structure of 97592-20-6

Chemical Structure| 97592-20-6

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Product Details of [ 97592-20-6 ]

CAS No. :97592-20-6
Formula : C8H16O2Si
M.W : 172.30
SMILES Code : O=C(C1([Si](C)(C)C)CCC1)O

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Application In Synthesis of [ 97592-20-6 ]

* 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 [ 97592-20-6 ]

[ 97592-20-6 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 718632-46-3 ]
  • [ 97592-20-6 ]
  • 5-tert-butyl 2-ethyl 6,6-dimethyl-3-[1-(trimethylsilyl)cyclobutanecarboxamido]pyrrolo[3,4-c]pyrazole-2,5(4H,6H)-dicarboxylate [ No CAS ]
YieldReaction ConditionsOperation in experiment
64% To a solution of 13.9 g (80.4 mmol) of 1-(trimethylsilyl)cyclobutanecarboxylic acid synthesized in the similar manner as in Reference Example 1 in 105 ml of dehydrated dichloromethane, 6.96 ml (81.2 mmol) of oxalyl chloride and 0.32 ml (4.14 mmol) of DMF were added dropwise in this order between -25 C and -10C in an argon atmosphere and then stirred for 2 hours after the temperature was raised to 0C. To a solution of 8.74 g (26.9 mmol) of <strong>[718632-46-3]5-tert-butyl 2-ethyl 3-amino-6,6-dimethylpyrrolo[3,4-c]pyrazole-2,5(4H,6H)-dicarboxylate</strong> [synthesized according to the method described in ] and 23.5 ml (135 mmol) of DIPEA in 122 ml of dehydrated dichloromethane, the resulting reaction solution was added dropwise at 0C in an argon atmosphere and stirred at the same temperature as above for 16 hours. After the completion of the reaction, 486 ml of a 5% aqueous potassium bisulfate solution was added to the reaction solution and then the aqueous layer and the organic layer were separated. The aqueous layer was subjected to extraction with 200 ml of dichloromethane twice. All of the obtained organic layers were dried over anhydrous magnesium sulfate, filtered, and concentrated under reduced pressure. The obtained concentration residue was subjected to silica gel column chromatography (elution solvent: n-hexane:ethyl acetate = 86:14 to 53:47 (V/V)), and a fraction containing the compound of interest was concentrated under reduced pressure and dried under reduced pressure to obtain 8.30 g of the title compound (yield: 64%) as a white foam. Mass spectrum (CI, m/z): 479 [M+1]+. 1H-NMR spectrum (400 MHz, DMSO-d6) delta: 9.98 & 9.72 & 9.71 (s, total 1H), 4.50 - 4.37 (m, 4H), 2.53- 2.43 (m, 2H), 2.32 - 2.07 (m, 2H), 2.02 - 1.72 (m, 2H), 1.65 - 1.55 (m, 6H), 1.51 - 1.42 (m, 9H), 1.38 - 1.31 (m, 3H), 0.10 & 0.06 & 0.01 (s, total 9H).
64% To a solution of 13.9 g (80.4 mmol) of 1-(trimethylsilyl)cyclobutanecarboxylic acid synthesized in the same way as in Reference Example 1 in 105 ml of dichloromethane, 6.96 ml (81.2 mmol) of oxalyl chloride and 0.32 ml (4.14 mmol) of DMF were added dropwise in this order between -25 C. and -10 C. in an argon atmosphere, then the temperature was raised to 0 C., and the resultant was reacted for 2 hours with stirring. This reaction solution was added dropwise into a solution of 8.74 g (26.9 mmol) of <strong>[718632-46-3]5-tert-butyl 2-ethyl 3-amino-6,6-dimethylpyrrolo[3,4-c]pyrazole-2,5(4H,6H)-dicarboxylate</strong> [synthesized according to the method described in Journal of Medicinal Chemistry 2012, 55 (10), 4728-4739] and 23.5 ml (135 mmol) of DIPEA in 122 ml of dichloromethane at 0 C. in an argon atmosphere and reacted at 0 C. for 16 hours with stirring. After completion of the reaction, the reaction solution was separated into an organic layer and an aqueous layer by the addition of 486 ml of a 5% aqueous potassium bisulfate solution, and then, the aqueous layer was subjected to extraction twice with 200 ml of dichloromethane. The whole organic layer thus obtained was dried over anhydrous magnesium sulfate, filtered, and concentrated under reduced pressure. The obtained concentration residue was subjected to silica gel column chromatography (elution solvent: n-hexane:ethyl acetate=86:14?53:47 (V/V)), and a fraction containing the compound of interest was concentrated under reduced pressure and dried under reduced pressure to obtain 8.30 g of the title compound (yield: 64%) as a white foam. Mass spectrum (CI, m/z): 479 [M+1]+. 1H-NMR spectrum (400 MHz, DMSO-d6) delta: 9.98 & 9.72 & 9.71 (s, total 1H), 4.50-4.37 (m, 4H), 2.53-2.43 (m, 2H), 2.32-2.07 (m, 2H), 2.02-1.72 (m, 2H), 1.65-1.55 (m, 6H), 1.51-1.42 (m, 9H), 1.38-1.31 (m, 3H), 0.10 & 0.06 & 0.01 (s, total 9H).
 

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