Purity | Size | Price | VIP Price | USA Stock *0-1 Day | Global Stock *5-7 Days | Quantity | |||||||
{[ item.p_purity ]} | {[ item.pr_size ]} | Login | Inquiry |
{[ getRatePrice(item.pr_usd, 1,1,item.pr_is_large_size_no_price) ]} {[ getRatePrice(item.pr_usd,item.pr_rate,1,item.pr_is_large_size_no_price) ]} |
{[ getRatePrice(item.pr_usd, 1,1,item.pr_is_large_size_no_price) ]} | Inquiry {[ getRatePrice(item.pr_usd,item.pr_rate,item.mem_rate,item.pr_is_large_size_no_price) ]} {[ getRatePrice(item.pr_usd,1,item.mem_rate,item.pr_is_large_size_no_price) ]} | {[ item.pr_usastock ]} | in stock Inquiry - | {[ item.pr_chinastock ]} | {[ item.pr_remark ]} in stock 1-2 weeks - Inquiry - | Login | Inquiry |
Please Login or Create an Account to: See VIP prices and availability
CAS No. : | 4474-86-6 | MDL No. : | MFCD00065696 |
Formula : | C12H14N2O5 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | FUCKRCGERFLLHP-SECBINFHSA-N |
M.W : | 266.25 | Pubchem ID : | 1712147 |
Synonyms : |
|
Chemical Name : | N-Cbz-D-Asparagine |
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 |
---|---|---|
6.16 g | With bromine; sodium hydroxide; In water; at 55℃; for 3h;Cooling with ice; | Under ice-cooling, to a 1M aqueous solution of sodium hydroxide (124 ml) was added dropwise bromine (6.60 ml), and then after adding <strong>[4474-86-6](R)-2-benzyloxycarbonylaminosuccinamic acid</strong> (10.0 g), the mixture was stirred at 55 C. for 3 hours. This reaction solution was cooled to room temperature, washed twice with diethyl ether, and then a 6M aqueous solution of hydrochloric acid (21 ml) was added thereto. This reaction mixture was left to stand at 4 C. for 3 days, and a precipitated solid was collected by filtration to give the titled compound (6.16 g). 1H-NMR (DMSO-D6) delta: 3.19-3.22 (m, 1H), 3.63 (dd, 1H, J=10.2, 5.0 Hz), 4.67 (dd, 1H, J=10.2, 3.3 Hz), 5.14-5.18 (m, 2H), 7.28-7.40 (m, 5H), 7.56 (s, 1H), 13.24 (br s, 1H). |
To a solution of [NAOH] (2.48 g, 61.97 mmole) in water (50 ml) at [0C] is added bromine (3.305 g, 20.66 mmole). After 5 min, (R)-NCbz- Asparagine is added to the above solution and the mixture is stirred at [50C] for lh. Addition of 5% Na2S203 and then extraction with Et20 [(1X100] [ML).] The aqueous phase is acidified to pH 2 with 6N [HC1] and the reaction mixture is left in the fridge for 6 days. Filtration of the crystals, and recrystalization in hot water to afford (4R)-3- [ (benzyloxy) carbonyl] -2-oxoimidazolidine-4-carboxylic acid as a white powder. 1H NMR (DMSO-D6) [delta] 7.5-7.2 (M, 5H), 6.5 (SL, 1H), 5.28 (S, 2H), 4.88 (M, 1H), 3.88 (M, 1H), 3.5 (M, 1H) ; MS 263.2 (M-1). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With 1-hydroxy-pyrrolidine-2,5-dione; dicyclohexyl-carbodiimide; | Intermediate 7; (3R)-3-(N-Cbz-amino)azolane-2,5-dioneCyclisation of N(alpha)-Cbz-D-asparagine (10 g, 37.5 mmol) in the presence of DCC(7.8 g, 37.5 mmol) and N-hydroxysuccinimide (4.4 g, 37.5 mmol) in DMF (50 ml) as described above gave 4.2 g of the product as white solid, mp 66-69 C; 1H NMR (300 MHz, CDC13) delta 6 2.80-2.89 (m, 1 H), 3.04-3.12 (m, 1 H), 4.33-10 4.41 (m, 1 H), 5.11 (s, 2 H), 4.61 (brs, 1 H), 7.34 (s, 5 H), 8.55 (brs, 1 H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In tetrahydrofuran; sodium hydrogencarbonate; ethyl acetate; | (a) (R)-4-Amino-2-[[(benzyloxy)carbonyl]amino]-4-oxobutanoic acid A solution of benzyl chloroformate (58.32 ml., 0.41 mole) in tetrahydrofuran (50 ml.) is added dropwise to a solution of D(-)asparagine hydrate (50 g., 0.33 mole) dissolved in 1 l. of saturated sodium bicarbonate. The solution is allowed to stir at room temperature for 6 hours and then extracted with ethyl acetate (3*200 ml.). The aqueous layer is concentrated in vacuo to remove traces of ethyl acetate, then acidified to pH of 3. A white precipitate is collected and subsequently washed with water and then dried over phosphorus pentoxide to give 74 g. of (R)-4-amino-2-[[(benzyloxy)carbonyl]amino]-4-oxobutanoic acid, m.p. 206-210. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
2.5 g | With benzotriazol-1-ol; dicyclohexyl-carbodiimide; In N,N-dimethyl-formamide; at 0 - 20℃; for 48h; | Step 3f: To a stirred solution of <strong>[4474-86-6]Cbz-D-Asn-OH</strong> (1.78 g, 6.7 mmol) and compound 3g (3.0 g, 6.8 mmol) in DMF (75 mL), DCC (4.12 g, 20.3 mmol) and HOBT (1.8 g, 13.5 mmol) were added slowly at 0 C. The reaction mixture was stirred for 48 h at room temperature. Progress of reaction was monitored by TLC. After completion, the reaction mass was partitioned between ethyl acetate and water. Organic layer was washed with water, brine, dried over Na2SO4 and evaporated under reduced pressure to yield crude. The crude compound was purified by silica gel (60-120 mesh) column chromatography (Eluent: 4% MeOH in DCM) to yield 2.5 g of Compound 3h, LCMS: 697.50 (M+H)+. |
2.5 g | With benzotriazol-1-ol; dicyclohexyl-carbodiimide; In N,N-dimethyl-formamide; at 0 - 20℃; for 48h; | To a stirred solution of <strong>[4474-86-6]Cbz-D-Asn-OH</strong> (1.78 g, 6.7 mmol) and compound 3g (3.0 g, 6.8 mmol) in DMF (75 mL), DCC (4.12 g, 20.3 mmol) and HOBT (1.8 g, 13.5 mmol) were added slowly at 0 C. The reaction mixture was stirred for 48 h at room temperature.Progress of reaction was monitored by TLC. After completion, the reaction mass was partitioned between ethyl acetate and water. Organic layer was washed with water, brine,dried over Na2SO4 and evaporated under reduced pressure to yield crude. The crude compound was purified by silica gel (60-120 mesh) column chromatography (Eluent: 4% MeOH in DCM) to yield 2.5 g of Compound 3h, LCMS: 697.50 (M+H). |
感谢您访问我们的网站,您可能还对以下资源感兴趣:
成人免费xx,国产又黄又湿又刺激不卡网站,成人性视频app菠萝网站,色天天天天