Method for Manufacturing Hydroxyl Group Substitution Product
申请人:Ishii Akihiro
公开号:US20110251403A1
公开(公告)日:2011-10-13
In the present invention, a hydroxyl group substitution product is manufactured by reaction of an alcohol with sulfuryl fluoride (SO
2
F
2
) in the presence of an organic base and a nucleophile (X
−
). The present invention is thus effective as an industrial manufacturing method that uses a relatively cheap reagent suitable for large-scale applications and can be accomplished in a simple process with easy purification operation and less waste generation and is suitably applicable for manufacturing of optically active hydroxyl group substitution products, notably optically active α-hydroxyl group substitution ester and optically active 4-hydroxyl group substitution proline. The manufacturing method of the present invention solves all of the prior art problems and can be applied for industrial uses.
The effects of 2-phthalimidooxyalkanoic acid derivatives on the germination and root-growth of cress were examined. Since 2-phthalimidooxypropionates were most effective, the optically active ethyl esters were prepared. As the result of biological testing, the (S)-(-)-isomer exhibited stronger activity than the (R)-(+)-isomer. This result is contrary to those from commercial herbicides with similar structures, phenoxy- and oxyphenoxy-propionate-type compounds, where the (R)-isomers are generally known to be the active principles.
Polymer supported synthesis of a natural product-inspired oxepane library
作者:Sudipta Basu、Herbert Waldmann
DOI:10.1016/j.bmc.2014.05.039
日期:2014.8
the natural product scaffolds. Their synthesis requires the development of novel strategies amenable to formats suitable for library build-up. We describe a method for the synthesis of an oxepane library inspired by the core structure of oxepane natural products endowed with multiple bioactivities. Core aspects of the strategy are the establishment of a one-pot method employing different immobilized
GC Separation of Enantiomers of Alkyl Esters of 2-Bromo Substituted Carboxylic Acids Enantiomers on 6-TBDMS-2,3-di-alkyl- β- and γ-Cyclodextrin Stationary Phases
作者:Ivan Špánik、Darina Kačeriaková、Jan Krupčík、Daniel Wayne Armstrong
DOI:10.1002/chir.22310
日期:2014.6
The gas chromatographic separation of enantiomers of 2‐Br carboxylicacid derivatives was studied on four different 6‐TBDMS‐2,3‐di‐O‐alkyl‐ β‐ and ‐γ‐CD stationaryphases. The differences in thermodynamic data ΔH and –ΔS} for the 15 structurally related racemates were evaluated. The influence of structure differences in the alkyl substituents covalently attached to the stereogenic carbon atom, as
Novel Juvenoids of the 2-(4-hydroxybenzyl)cyclohexan-1-one Series
作者:Zden�k Wimmer、David ??aman、Wittko Francke
DOI:10.1002/hlca.19940770210
日期:1994.3.23
A series of insect juvenile hormone analogs (juvenoids) was synthesized and studied. The basic skeleton of these juvenoids contains three rings and a short aliphatic subunit and bears two or three chiral centers (depending on the appropriate structure; see 6–9). The chiral center located in the 1,2-diphenoxypropane subunit has the configuration (RS), (R) (a series), or (S) (b series). The juvenoids