輕松掃碼查看產(chǎn)品文檔 | TCIMAIL No.197 已上新 | TCI試劑——品質(zhì)可靠，值得信賴
訂購方法？聯(lián)系方式：021-67121386 / Sales-CN@TCIchemicals.com
TCI使用Cookie來個性化和改善您的用戶體驗，您可以訪問我們的隱私權政策 了解更多信息。
Maximum quantity allowed is 999
請選擇數(shù)量
CAS RN: 13675-18-8 | 產(chǎn)品編碼: T2953
Tetrahydroxydiboron
×
![]()
×
純度/分析方法:
別名：
- 四羥基二硼
- 四羥基二硼烷
- 二硼酸
- 雙-硼酸
- Tetrahydroxydiborane
- Diboronic Acid
查看全部
產(chǎn)品文檔：
| 規(guī)格 | 單價 | 上海 | 天津 | 日本* | 數(shù)量 |
庫存詳情
|
|---|---|---|---|---|---|---|
| 1G |
￥160.00
|
1 | 1 | 請聯(lián)系我們 |
|
|
| 5G |
￥510.00
|
4 | 1 | ≥40 |
|
|
| 25G |
￥1,320.00
|
1 | 1 | 14 |
|
* 點擊“查詢”可查看預計發(fā)貨日期，僅供參考。
* 無具體發(fā)貨日期的情況，如：顯示“8個工作日后發(fā)貨”，將在您訂購日起的8個工作日后發(fā)貨。
* 我們將以最優(yōu)方式從上海/天津兩大倉庫發(fā)貨。國內(nèi)庫存不足，需兩周左右向日本總部調(diào)貨。
* 對于可分裝產(chǎn)品，11:30前的訂單，當天發(fā)貨；11:30后的訂單，隔天發(fā)貨。
* 如需大包裝，請點擊“大包裝詢價”按鈕（對于某些產(chǎn)品我們無法提供大包裝）。
* TCI會經(jīng)常復審儲藏條件以對其進行優(yōu)化，請以在線目錄為準，敬請留意。
* 更多信息，請聯(lián)系營業(yè)部：021-67121386 / Sales-CN@TCIchemicals.com 。任何貨期、規(guī)格或包裝方面的需求，請聯(lián)系我們 。
* 無具體發(fā)貨日期的情況，如：顯示“8個工作日后發(fā)貨”，將在您訂購日起的8個工作日后發(fā)貨。
* 我們將以最優(yōu)方式從上海/天津兩大倉庫發(fā)貨。國內(nèi)庫存不足，需兩周左右向日本總部調(diào)貨。
* 對于可分裝產(chǎn)品，11:30前的訂單，當天發(fā)貨；11:30后的訂單，隔天發(fā)貨。
* 如需大包裝，請點擊“大包裝詢價”按鈕（對于某些產(chǎn)品我們無法提供大包裝）。
* TCI會經(jīng)常復審儲藏條件以對其進行優(yōu)化，請以在線目錄為準，敬請留意。
* 更多信息，請聯(lián)系營業(yè)部：021-67121386 / Sales-CN@TCIchemicals.com 。任何貨期、規(guī)格或包裝方面的需求，請聯(lián)系我們 。
| 產(chǎn)品編碼 | T2953 |
| 分子式/分子量 | H__4B__2O__4 = 89.65 |
| 外觀與形狀（20°C） | 固體 |
| 儲存溫度 | 室溫 (15°C以下陰涼干燥處) |
| 包裝和容器 | 1G-帶有塑料內(nèi)管的玻璃瓶 （查看圖片） |
| CAS RN | 13675-18-8 |
| Reaxys-RN | 14723923 |
| PubChem物質(zhì)ID | 253660323 |
| MDL編號 | MFCD05663888 |
技術規(guī)格
| Appearance | White to Almost white powder to crystal |
| Purity(Neutralization titration) | 98.0 to 110.0 % |
物性（參考值）
| 熔點 | 290 °C |
| 溶解性（可溶于） | 甲醇 |
GHS
| 象形圖 |
|
| 信號詞 | 警告 |
| 危險性說明 | H315 : 造成皮膚刺激。 H319 : 造成嚴重眼刺激。 |
| 防范說明 | P264 : 作業(yè)后徹底清洗皮膚。 P280 : 戴防護手套/戴防護眼罩/戴防護面具。 P302 + P352 : 如皮膚沾染：用水充分清洗。 P337 + P313 : 如仍覺眼刺激：求醫(yī)/就診。 P305 + P351 + P338 : 如進入眼睛：用水小心沖洗幾分鐘。如戴隱形眼鏡并可方便地取出，取出隱形眼鏡。繼續(xù)沖洗。 P362+P364 : 脫掉沾污的衣服，清洗后方可重新使用。 P332 + P313 : 如發(fā)生皮膚刺激：求醫(yī)/就診。 |
相關法規(guī)
| 新化學物質(zhì)備案回執(zhí)號 | B1A232216151 |
運輸信息
| 監(jiān)管條件代碼(*) |
應用
TCI Practical Example: Chemoselective Reduction of Nitro Group Using Diboronic Acid
-
Used Chemicals
-
Procedure
-
To a solution of trans-4-nitrostilbene (1.13 g, 5.00 mmol), diboronic acid (1.34 g, 15.0 mmol, 3.0 eq.) in DMF (30 mL) was added 4,4’-bipyridyl (3.9 mg, 0.025 mmol, 0.50 mol%) at r.t. and the mixture was stirred at the same temperature for 1 hour. The reaction mixture was diluted by 1 mol/L NaHCO3 aq. (100 mL) and the resulting solid was filtered off. The solid was purified by column chromatography (dichloromethane：hexane = 0:1 - 4:1 on silica gel) to give trans-4-aminostilbene as a yellow solid (891 mg, y. 91%).
-
Experimenter’s Comments
-
The reaction mixture was monitored by UPLC.
-
Analytical Data
-
trans-4-Aminostilbene
1H NMR (270 MHz, CDCl3); δ 7.47 (d, 2H, J = 7.0 Hz), 7.38-7.30 (m, 4H), 7.21 (t, 1H, J = 7.0 Hz), 7.03 (d, 1H, J = 15 Hz), 6.91 (d, 1H, J = 15 Hz), 6.63 (d, 2H, J = 8.6 Hz), 3.75 (brs, 2H).
-
Lead Reference
-
- Metal-Free, Rapid, and Highly Chemoselective Reduction of Aromatic Nitro Compounds at Room Temperature
應用
Diboronic Acid Usable for the Direct Synthesis of Aromatic Boric Acid Derivatives
[Experimental Procedure]
To an oven-dried glass vessel is added (X-Phos) palladium(II) phenethylamine chloride (7.38 mg, 0.01 mmol), X-Phos (9.52 mg, 0.02 mmol), tetrahydroxydiborane, (133.5 mg, 1.5 mmol), KOAc (294 mg, 3 mmol), and NaOt-Bu (1 mg, 0.01 mmol). The vessel is evacuated and backfilled with N2 (three times). EtOH (10 mL degassed) is added followed by the addition of 4-chloroanisole (1 mmol). The reaction is then heated to 80 °C for 18 hours. The reaction is cooled to rt then filtered through a thin pad of Celite (eluting with EtOAc) and concentrated. To the residue is added 1 M aqueous HCl and EtOAc (25 mL each). This mixture is stirred 30 min and the aqueous layer is removed, and the organic layer is washed with brine. The combined aqueous layers are extracted with EtOAc (3 x 10 mL). The combined organics are dried (Na2SO4) and then concentrated. The crude mixture is taken up in CH2Cl2, the corresponding diol is added (1.35 mmol), and the crude reaction is allowed to stir at rt. At completion of the reaction, the reaction is concentrated, and the residue is purified by flash column chromatography to afford the desired aryl boric acid derivatives.
To an oven-dried glass vessel is added (X-Phos) palladium(II) phenethylamine chloride (7.38 mg, 0.01 mmol), X-Phos (9.52 mg, 0.02 mmol), tetrahydroxydiborane, (133.5 mg, 1.5 mmol), KOAc (294 mg, 3 mmol), and NaOt-Bu (1 mg, 0.01 mmol). The vessel is evacuated and backfilled with N2 (three times). EtOH (10 mL degassed) is added followed by the addition of 4-chloroanisole (1 mmol). The reaction is then heated to 80 °C for 18 hours. The reaction is cooled to rt then filtered through a thin pad of Celite (eluting with EtOAc) and concentrated. To the residue is added 1 M aqueous HCl and EtOAc (25 mL each). This mixture is stirred 30 min and the aqueous layer is removed, and the organic layer is washed with brine. The combined aqueous layers are extracted with EtOAc (3 x 10 mL). The combined organics are dried (Na2SO4) and then concentrated. The crude mixture is taken up in CH2Cl2, the corresponding diol is added (1.35 mmol), and the crude reaction is allowed to stir at rt. At completion of the reaction, the reaction is concentrated, and the residue is purified by flash column chromatography to afford the desired aryl boric acid derivatives.
References
- 1)Palladium-Catalyzed, Direct Boronic Acid Synthesis from Aryl Chlorides: A Simplified Route to Diverse Boronate Ester Derivatives
參考文獻
產(chǎn)品文檔 (部分產(chǎn)品的分析圖譜無法提供，敬請諒解。)
化學品安全說明書(SDS)
請選擇語言。
如需更多幫助，請聯(lián)系我 們。
技術規(guī)格
CoA及其他文檔
請輸入批號
批號輸入有誤。請輸入中橫線前的4-5個字母數(shù)字字符。
示例 CoA
可下載CoA示例。注：該示例不一定是最新批次的CoA。
目前沒有該產(chǎn)品的 CoA?示例。
分析圖譜
請輸入批號
批號輸入有誤。請輸入中橫線前的4-5個字母數(shù)字字符。
很抱歉，您搜索的分析圖譜無法提供。