1) prochiral ketone
前手性酮
1.
Using 10 as the catalyst, six prochiral ketones were reduced enantioselectively with borane and the results were compared with those with 1,1- diphenylprolinol as catalys.
用10催化6种前手性酮的不对称硼烷还原反应,其结果与(S)-二苯基脯氨醇催化的同一反应的结果进行了对比。
2.
Two groups of catalysts,(S)-diphenylprolinol(1) and(2S)-diphenylhydroxymethyl-(4S)-phenoxy-pyrrolidine(2),(R)-2-amino-1,1-diphenyl-3-(2-naphthyl)-1-propanol(3) and(R)-1-(1′-amino-2′-naphthylethyl)-cyclopentanol(4),were prepared and used in the enantioselective reduction of six prochiral ketones with borane.
以合成的两组手性催化剂,(S)-二苯基脯氨醇(1)和(2S)-(二苯基羟甲基)-4苯氧基-四氢吡咯(2),(R)-2-氨基-1,1-二苯基-3-(2′-萘基)-1-丙醇(3)和(R)-1-(1′-氨基-2′-萘乙基)-环戊醇(4),用于六种前手性酮的不对称硼烷还原反应,比较其还原结果,发现(2)的性能优于(1),(4)优于(3)。
3.
Asymmetric reduction of prochiral ketones using oxazaborolidines has become one of the standard tools for the synthetic chemist, allowing access to enantiomerically enriched secondary alcohols with excellent enantiomeric excess that may seve as the chiral ligands for enantionselectivity synthesis and highly useful intermediates in the sy.
手性噁唑硼烷催化前手性酮的不对称还原反应已成为合成化学家的重要手段之一,这种方法获得的手性仲醇具有较高的ee 值,它们可作为不对称合成中的手性配体及活性物质、天然产物和药物的手性中间体。
2) prochiral ketones
前手性酮
1.
The asymmetric borohydride reduction of prochiral ketones by different kinds of chiral phase transfer catalysts under the condition of S L phase transfer catalysis was explored and the influence of different solvents, temperatures and catalysts to the reaction was investigated.
在固—液相转移 (PTC)条件下 ,研究了前手性酮的不对称硼氢化还原 ,对不同的催化剂、反应溶剂、温度及反应底物对不对称诱导的影响进行了调查 ,结果表明固—液 PTC比液—液 PTC具有更高的光学产率。
2.
Asymmetric borane reduction of prochiral ketones is a good process to the synthesis of enantiomerically enriched secondary alcohols.
硼烷对前手性酮的不对称还原是合成手性仲醇的重要方法。
3) aromatic prochiral ketone
前手性芳香酮
1.
A chiral complex, in situ prepared from (-)quinine and CoCl2 was used as catalyst for asymmetric reduction of aromatic prochiral ketones: pR2C6H4COR1 (R1, R2 shown in Tab.
奎宁与钴(Ⅱ)手性络合物用于前手性酮的不对称催化还原刘湘*李纪国张正(无锡轻工大学化工系无锡214036)(南京大学化学系南京)关键词手性络合物,不对称还原,前手性芳香酮1996-10-25收稿,1997-04-22修回前手性酮的不对。
4) reduction of prochiral ketones
前手性酮的还原
5) chiral ketones
手性酮
1.
Dioxiranes,which could be generated in situ from chiral ketones and potassium peroxomonosulfate(KHSO_5),have been shown to be remarkably promising oxidation reagents for asymmetric epoxidation of cis-olefins,trans-olefins,trisubstituted olefins and terminal olefins.
由糖衍生的手性酮是非官能化烯烃的有机催化不对称环氧化的一类重要催化剂,它与过氧硫酸氢钾(KHSO5)可原位产生对顺式烯烃、反式烯烃、三取代烯烃和末端烯烃均有效的氧化剂———手性二氧杂环丙烷。
6) Chiral ketone
手性酮
1.
Chiral ketone 4 derived from D-(-)-fructose was obtained by four steps reaction including protection with acetone, oxidation, deprotection selectively and trifluroacetylation.
以D-(-)-果糖为手性源,经过丙酮保护、氧化、选择性脱保护、三氟酰化四步反应得到手性酮4。
2.
Dioxiranes, which could be generated in situ from chiral ketone and potassium peroxomonosulfate (Oxone), are remarkably effective oxidation reagents for asymmetric epoxidation of olefins.
手性酮是催化非官能化烯烃不对称环氧化的一类重要催化剂 ,它与过氧硫酸氢钾可原位产生对贫电子和富电子烯烃均很有效的氧化剂———手性二氧杂环丙烷 。
3.
The reactions includes dimerization of the a-methylstyrene (AMS), deprotection of acetals(ketals) and asymmetric epoxidation catalyzed by chiral ketones.
本论文研究了离子液体在三类有机反应中的应用:(1) 酸性离子液体[Hmim]~+BF_4~-催化的a-甲基苯乙烯二聚;(2) Brφnsted酸性离子液体催化缩醛和缩酮脱保护;(3) 离子液体中手性酮催化的不对称环氧化反应初探。
补充资料:前手性
分子式:
CAS号:
性质:手性和前手性是两个相关的概念。如果一个非手性分子含有立体异位的配体(原子或基团)或立体异位面,经反应后失去对称性,得到对映异构体或非对映异构体的手性分子,则这种能由非手性转变为手性的特性即为前手性,该分子为前手性分子。
CAS号:
性质:手性和前手性是两个相关的概念。如果一个非手性分子含有立体异位的配体(原子或基团)或立体异位面,经反应后失去对称性,得到对映异构体或非对映异构体的手性分子,则这种能由非手性转变为手性的特性即为前手性,该分子为前手性分子。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条