Enantioselective water-soluble iron–porphyrin-catalyzed epoxidation with aqueous hydrogen peroxide and hydroxylation with iodobenzene diacetate
作者:Paul Le Maux、Hassan F. Srour、Gérard Simonneaux
DOI:10.1016/j.tet.2012.05.014
日期:2012.7
The asymmetric epoxidation of styrene derivatives by H2O2 (or UHP) to give optically active epoxides (ee up to 81%) and hydroxylation of alkanes to give optically active secondary alcohols (ee up to 78%) were carried out in methanol and water using chiral water-soluble ironporphyrins as catalysts.
H 2 O 2(或UHP)对苯乙烯衍生物进行不对称环氧化,得到旋光性环氧化物(ee高达81%),烷烃的羟基化反应得到旋光性仲醇(ee高达78%)在甲醇中进行。使用手性水溶性铁卟啉作为催化剂的水。
Enantioselective Manganese-Porphyrin-Catalyzed Epoxidation and C–H Hydroxylation with Hydrogen Peroxide in Water/Methanol Solutions
作者:Hassan Srour、Paul Le Maux、Gerard Simonneaux
DOI:10.1021/ic300457z
日期:2012.5.21
alkene and hydroxylation of arylalkane derivatives by H2O2 to give optically active epoxides (enantiomeric excess (ee) up to 68%) and alcohols (ee up to 57%), respectively, were carried out in water/methanol solutions using chiral water-soluble manganese porphyrins as catalysts.
在水/甲醇中分别进行烯烃的不对称环氧化和H 2 O 2对芳基烷烃衍生物的羟基化作用,分别得到光学活性的环氧化物(对映体过量(ee)高达68%)和醇(ee高达57%)。手性水溶性锰卟啉作为催化剂的溶液。
Direct observation of a lithiated oxirane: a synergistic study using spectroscopic, crystallographic, and theoretical methods on the structure and stereodynamics of lithiated ortho-trifluoromethyl styrene oxide
作者:Antonio Salomone、Filippo M. Perna、Aurelia Falcicchio、Sten O. Nilsson Lill、Anna Moliterni、Reent Michel、Saverio Florio、Dietmar Stalke、Vito Capriati
DOI:10.1039/c3sc52099d
日期:——
epoxides, long considered “fleeting” intermediates in the reactions of epoxides with strong bases, have nowadays proven to be key synthons for asymmetric synthesis. In this study, the solution and the solid state structure of an α-lithiated aryloxirane, namely α-lithiated ortho-trifluoromethyl styrene oxide (1-Li), were determined. Single crystal X-ray diffraction analysis of 1-Li performed at 100 K applying
Asymmetric epoxidation of alkenes and benzylic hydroxylation with P450tol monooxygenase from Rhodococcus coprophilus TC-2
作者:Aitao Li、Shuke Wu、Joseph P. Adams、Radka Snajdrova、Zhi Li
DOI:10.1039/c4cc03491k
日期:——
P450tol monooxygenase was discovered as a unique and highly enantioselective enzyme for asymmetric epoxidation of some terminal alkenes containing electron-withdrawing groups and benzylic hydroxylation of several ethylbenzenes giving the corresponding useful and valuable products, such as (R)-2- and 3-substituted styrene oxides, (S)-4-substituted styrene oxides, and (S)-benzylic alcohols, in high ee
作者:Vito Capriati、Saverio Florio、Filippo Maria Perna、Antonio Salomone
DOI:10.1002/chem.201000897
日期:2010.8.23
The configurationalstability of some lithiated fluorinated styrene oxides has been investigated. Chemical studies have shown that in ethereal solvents α‐lithiated ortho‐, meta‐, and para‐fluorostyrene oxides (2‐Li, α‐5‐Li, and α‐6‐Li) are all configurationally stable in the reaction time scale, whereas α‐lithiated ortho‐, meta‐, and para‐trifluoromethylstyrene oxides (9‐Li, 13‐Li, and 14‐Li) are configurationally