2) asymmetric dihydroxylation
不对称双羟基化反应
1.
N,N'-Diferrocenylmethyl-(1S,2S)-1,2-diphenylethanediamine was synthesized by two steps from (1S,2S)-1,2-diphenylethanediamine and ferrocenealdehyde, and has been used as chiral ligand to asymmetric dihydroxylation of olefins.
(1S,2S)-1,2-二苯基乙二胺和甲酰基二茂铁经缩合和还原两步反应,以90%的产率合成了N,N'-二茂铁甲基-(1S,2S)-1,2-二苯基乙二胺,并以其为配体催化烯烃的不对称双羟基化反应,获得了较高的对映选择性(71%～86%ee)。
3) Asymmetric dihydroxylation of olefins
烯烃的不对称双羟基化
4) asymmetric dihydroxylation
不对称双羟化
1.
The use of(QD)_2 PYDZ in asymmetric dihydroxylation(AD)of olelfins provided the corresponding chiral vicinal diols with 88～95%chemical yield and the values of enantiomeric excess(ess)are between 75% and 99%.
烯烃不对称双羟化反应(Asymmetric D ihydroxylation,简称AD反应)和不对称氨羟化反应(Asymmet-ric Am inohydroxylation,简称AA反应)是获得手性连二醇和手性β-氨基醇的最简便的方法[1]。
2.
A series of enantiopure β-amino alcohols were synthesized from the corresponding diols pro- duced by Sharpless asymmetric dihydroxylation, cyclization of diols, azide opening of epoxides, and cata- lytic hydrogenation of the resulting azido alcohols.
在手性配体1,4-双(9-O-奎宁)-2,3-二氮杂萘[(QN)2PHAL]存在下,通过烯烃的Sharpless不对称双羟化、环化、亲核开环和催化氢化等步骤方便地合成了手性β-氨基醇。
3.
Moreover, the resin-bound OsO 4 exhibited excellent catalytic activity in the asymmetric dihydroxylation of olefins and was easily recovered and reused in five consecutive reactions, without significant decrease in activity.
合成了在烯烃不对称双羟化反应中可回收和重复使用的TentaGel支载的OsO4催化剂 。
5) Sharpless' asymmetric dihydroxylation
sharpless不对称双羟化
1.
Methods Sharpless′ asymmetric dihydroxylation was employed to construct the 3-hydroxychroman.
方法 运用sharpless不对称双羟化构筑手性的 3 羟基苯并二氢吡喃。
6) Asymmetric dihydroxylation
不对称二羟基化
1.
METHODS The asymmetric dihydroxylations of trans stilbene, naphthyl allyl ether and styrene were catalyzed by DHQD PHAL OPEG OMe/OsO 4 with tBuOH H 2O (1∶1) as the solvent and K 3Fe(CN) 6 as the cooxidant.
方法 以 t Bu OH/H2 O(1∶1)为溶剂 ,以 K3Fe(CN ) 6 为共氧化剂 ,用 DHQD- PHAL -OPEG- OMe/Os O4 分别催化反式二苯乙烯、萘基烯丙基醚和苯乙烯的不对称二羟基化反应 。
2.
The asymmetric dihydroxylation of ortho-substituted 1,2-diphenylethenes affords the corresponding diols in good yields (77～89%) and high enantiomeric excesses (73～98%) in the presence of catalytic amount OsO4 and four different chiral ligands respectively.
邻位取代１，２－二苯乙烯催化不对称二羟基化反应张生勇，孙晓莉（第四军医大学化学教研室西安７１００３２）关键词 不对称二羟基化，手性二醇近年催化的反式稀烃的不对称二羟基化反应取得明显进展［１］，但催化的邻位取代的１，２－二苯乙烯类化合物。
补充资料：不对称羟基化
分子式：
CAS号：
性质：应用羟基化反应进行不对称合成。
CAS号：
性质：应用羟基化反应进行不对称合成。
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