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手性有機(jī)小分子催化劑具有反應(yīng)條件溫和、環(huán)境友好、易于回收利用等優(yōu)點(diǎn),符合綠色化學(xué)的要求,成為近年來(lái)不對(duì)稱催化領(lǐng)域的一個(gè)研究熱點(diǎn)。
手性環(huán)胍類有機(jī)小分子催化劑
手性環(huán)胍類有機(jī)小分子催化劑可用于不對(duì)稱的Michael 加成反應(yīng)、Mannich反應(yīng)、脫羧反應(yīng)、胺化反應(yīng)及炔烴的手性連烯重排反應(yīng)等等,并可實(shí)現(xiàn)良好收率和立體選擇性,充分顯示了手性環(huán)胍小分子催化劑在不對(duì)稱反應(yīng)中的巨大潛力。

產(chǎn)品優(yōu)勢(shì)

  • 產(chǎn)品性質(zhì)穩(wěn)定,易于儲(chǔ)存;
  • 反應(yīng)條件溫和,反應(yīng)易于操作;
  • 反應(yīng)底物范圍廣,可催化多種反應(yīng)類型;
  • 催化劑無(wú)金屬殘留,可用于制藥或香精香料生產(chǎn);
  • 高度優(yōu)勢(shì)的產(chǎn)品價(jià)格,齊全的包裝規(guī)格,國(guó)內(nèi)現(xiàn)貨量充足。 
Technical Notes:
1. Biomimetic Enantioselective Decarboxylative Reactions catalysed by chiral bicyclic guanidine;
2. Bicyclic guanidine-catalyzed enantioselective Phospha-Michael reaction:
3. Bicyclic Guanidine-Catalyzed Direct Asymmetric Allylic Addition of N-Aryl Alkylidene-Succinimides;
4. Enantioselective Protonation Catalyzed by a Chiral Bicyclic Guanidine;
5. Chiral bicyclic guanidine catalysed Mannich reaction;
6. Enantiodivergent and g-Selective Asymmetric Allylic Amination;
7. Enantioselective Synthesis of Chiral Allenoates by Guanidine-Catalyzed Isomerization of 3-Alkynoates.
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                            更多手性環(huán)胍類小分子催化劑請(qǐng)點(diǎn)擊J&K新型手性環(huán)胍小分子催化劑》
References:
[1] Chem. Eur. J. 2011, 17, 8363 - 8370;
[2] Chemical Commununications, 2007, 47, 5058 - 5060;
[3] Chem. Eur. J. 2010, 16, 12534 - 12537;
[4] Angew. Chem. Int. Ed. 2008, 47, 5641 - 5645;
[5] a). Chem. Eur. J. 2011, 17, 3571 - 3574; b). Chem. Eur. J. 2010, 16, 779 - 782;
[6] Angew. Chem. Int. Ed. 2012, 51, 1 - 6;
[7] J. Am. Chem. Soc. 2009, 131, 7212 - 7213.
 
 脯氨酸類有機(jī)小分子催化劑
脯氨酸及其衍生物在有機(jī)小分子催化反應(yīng)中,顯現(xiàn)了重要的作用[1-6]。2000 年,List 等在JACS 上發(fā)表了題為“Proline-catalyzed Direct Asymmetric Aldol Reactions” 的通訊論文[2],開啟了有機(jī)催化發(fā)展的黃金時(shí)代,脯氨酸也成為最早直接用于分子間不對(duì)稱Aldol 反應(yīng)中的有機(jī)小分子催化劑,并且可以高立體選擇性地催化Mannich、Michael等多種不對(duì)稱反應(yīng),在天然產(chǎn)物全合成領(lǐng)域有著廣泛的應(yīng)用前景。
2012
年,Nature上報(bào)道了G. CoulthardW. Erb等以脯氨酸催化合成前列腺素的新方法,也是非常優(yōu)秀的有應(yīng)用前景的實(shí)例[7]
百靈威可提供以下幾類常見的脯氨酸類催化劑:
產(chǎn)品優(yōu)勢(shì)
產(chǎn)品無(wú)毒,環(huán)境友好; 
部分催化劑可溶于水,便于萃取分離;
催化反應(yīng)無(wú)需惰性氣體保護(hù),條件溫和,操作簡(jiǎn)便;
兩個(gè)對(duì)映體通常都有催化活性,且能夠回收重復(fù)使用,具工業(yè)化應(yīng)用前景[7, 8]。
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                      更多脯氨酸類小分子催化劑請(qǐng)點(diǎn)擊J&K脯氨酸有機(jī)小分子催化劑》
References:
[1] ACC. Chem. Res. 2012, 45, 248;
[2] J. Am. Chem. Soc. 2000,122, 2395 - 2396;
[3] Anal. Chim. Acta. 2010, 661, 60 - 66;
[4] Chem. Commun. 2009, 41, 6145 - 6158;
[5] Angew. Chem. Int. Ed. 2009, 48, 3333 - 3336;
[6] J. Am. Chem. Soc. 2009, 131, 10581;
[7] Nature, 2012, 489, 278 - 281;
[8] Angew. Chem. Int. Ed. 2010, 49, 4656 - 4660.
 相關(guān)試劑與耗材
鈀類催化劑
(三苯基膦)(0)
Tetrakis(triphenylphosphine)palladium(0), 99.8%
 
/, 10% Pd, 還原型
Palladium on carbon, 10% Pd, reduced, wet
格氏試劑
甲基溴化鎂
Methylmagnesium bromide, 3.0 M solution in diethyl ether, J&KSeal
 
乙基溴化鎂
Ethylmagnesium bromide, 1.0 M solution in THF, J&KSeal
 
乙烯基溴化鎂
Vinylmagnesium bromide, 1.0 M solution in THF, J&KSeal
 
烯丙基溴化鎂
Allylmagnesium bromide, 1.0 M solution in diethyl ether, J&KSeal
鋰類試劑
正丁基鋰
n-Butyllithium, 2.4 M solution in hexanes, J&KSeal
 
正丁基鋰
n-Butyllithium, 1.6 M solution in hexanes, J&KSeal
氘代試劑
氘代氯仿
Chloroform-d, 99.8 atom%D, contains 0.03% v/v TMS, packed in 10*0.6 ml ampoules
 
二甲基亞砜-d6
Dimethyl sulfoxide-d6, 99.8 atom%D, contains 0.03% v/v TMS
NMR樣品管
5 mm 核磁管
5 mm NMR Economy Sample Tube w/ Cap, 7" L 50 Pk, High-Throughput
 
 
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