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Chemical Structure| 159622-09-0 Chemical Structure| 159622-09-0

Structure of 159622-09-0

Chemical Structure| 159622-09-0

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Product Details of [ 159622-09-0 ]

CAS No. :159622-09-0
Formula : C12H19NO4
M.W : 241.28
SMILES Code : O=C([C@]1(NC(OC(C)(C)C)=O)[C@H](C=C)C1)OC
MDL No. :MFCD11867362

Safety of [ 159622-09-0 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H315-H319-H335
Precautionary Statements:P261-P280-P301+P312-P302+P352-P305+P351+P338

Application In Synthesis of [ 159622-09-0 ]

* 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 [ 159622-09-0 ]

[ 159622-09-0 ] Synthesis Path-Downstream   1~3

  • 1
  • [ 159622-09-0 ]
  • [ 159622-10-3 ]
YieldReaction ConditionsOperation in experiment
100% The vinylcyclopropyl ester 1c (9.23 g, 38.3 mmol) was dissolved in THF (127 mL) and MeOH (127 mL). Aqueous lithium hydroxide solution (1.5 N, 127 mL, 202 mmol) was added at a fast dropwise pace. After 2 h at room temperature, more lithium hydroxide (4.6 g, 202 mmol) was added, and the suspension was stirred at room temperature for an additional 17 h. The suspension was cooled to 0° C. and acidified to pH 5 with 1N HCl, whereupon ethyl acetate (300 mL) was added. It was further acidified to pH 1 and extracted with ethyl acetate (2.x.300 mL). The combined organic layers were washed with brine (200 mL), dried over magnesium sulfate, and concentrated in vacuo to afford 8.91 g of the acid 1d in quantitative yield.
98% With lithium hydroxide monohydrate; water; In tetrahydrofuran; methanol; at 45℃; Ste 1: (lR,2S)-l-((tert-butoxycarbonyl)amino)-2-vin lcyclopropanecarboxylic A round-bottom flask was charged with (lR,2S)-ethyl l-((tert- butoxycarbonyl)amino)-2-vinylcyclopropanecarboxylate (4 g, 15.67 mmol) and lithium hydroxide monohydrate (2.63 g, 62.7 mmol). Methanol (52.2 ml), THF (52.2 ml) and water (52.2 ml) were added. The mixture was heated (oil bath at 45°C) overnight. The reaction mixture was concentrated to half-its volume in rotavap and the pH of the mixture was adjusted to pH = 2-3 with aq 1M HC1. The mixture was extracted with dichloromethane (3 x 150 mL). The combined organic extracts were washed with brine (50 mL), dried over magnesium sulfate, filtered and concentrated in rotavap to give the title compound (3.5 g, 15.40 mmol, 98 percent yield) as a white powder. No further purification was carried out.
  • 2
  • [ 159622-10-3 ]
  • [ 18107-18-1 ]
  • [ 159622-09-0 ]
  • 3
  • [ 67-56-1 ]
  • [ 159622-10-3 ]
  • [ 159622-09-0 ]
YieldReaction ConditionsOperation in experiment
92% With diazomethyl-trimethyl-silane; In hexane; toluene; at 20℃; for 0.5h; To a solution of (1R,2S)-12 (258 mg, 1.14 mmol) in methanol(2.9 mL) and toluene (11.6 mL) was added a 0.6 Msolution of trimethylsilyldiazomethane in hexane (2.77 mL,1.66 mmol) at rt and the mixture was stirred for 30 min.After work up with acetic acid, the whole was concentratedto give the crude product, which was chromatographed onsilica gel (hexane/ethyl acetate =10/1) affording methyl(1R,2S)-13 (253 mg, 92 percent) as a colorless oil, whose NMRdata matched those previously reported (Beaulieu et al.2005) and absolute stereochemistry and optical purity wasdetermined to be 99.2 percent ee by HPLC analysis under thefollowing conditions: CHIRALCEL OJ-H column (particlesize 5 mum, 250 × 4.6 mm i.d.); solvent system of 1 percentethanol in hexane in 30 min, flow rate of 0.75 mL/min,25 °C, and wavelength of 200 nm, in which the (1R,2S)-isomer was eluted at a retention time (tR) of 16.4 minwhile the (1S,2R)-isomer at 18.3 min in a ratio of 99.6:0.4,respectively. An authentic sample of (1R,2S)-13 was purchasedfrom Sigma?Aldrich (Product No. ANV00168-1G),whereas an authentic sample of the (1S,2R)-isomer was preparedby esterification of the corresponding carboxylic acid purchased from Sigma?Aldrich (Product No. CDS019348-100MG) using the same procedure (TMSCHN2).[alpha]D25 = + 43.9 (c = 1.02, methanol) [lit. (Beaulieu et al.2005) [alpha]D25 = +42.8 (c = 1.00, methanol)]. 1H-NMR(200 MHz, DMSO-d6, 81:19 ratio of rotamers): delta 1.30 (1H,dd, J = 9.5, 5.0 Hz, one of 3-H2), 1.35 (0.19 × 9H, s, Me3Cfor minor rotamer), 1.37 (0.81 × 9H, s, Me3C for majorrotamer), 1.57 (1H, dd, J = 7.6, 5.0 Hz, one of 3-H2), 2.11(1H, td, J = 9.5, 7.6 Hz, 2-H), 3.60 (0.81 × 3H, s, OMefor major rotamer), 3.62 (0.19 × 3H, s, OMe for minorrotamer), 5.07 (1H, dd, J = 10.2, 2.0 Hz), 5.23 (1H, dd,J = 17.2, 2.0 Hz), 5.62 (1H, ddd, J = 17.2, 10.2, 9.5 Hz),7.34 (0.19H, br s, NH for minor rotamer), 7.68 (0.81H, brs, NH for major rotamer). 13C-NMR (50.3 MHz, DMSOd6,81:19 ratio of rotamers): delta 22.7 (3-CH2 for major rotamer),23.1 (3-CH2 for minor rotamer), 28.1 (Me3C), 32.7(2-CH for major rotamer), 33.9 (2-CH for minor rotamer),40.2 (1-C, quaternary), 51.9 (OMe), 78.2 (Me3C), 117.3(CH=CH2 for minor rotamer), 117.4 (CH=CH2 for majorrotamer), 134.3 (CH=CH2), 155.2 (CON for minor rotamer),155.5 (CON for major rotamer), 171.1 (CO2Me).
 

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