Aryl groups may be unsubstituted or mono or polysubstituted with electron withdrawing or/and electron donating groups as described below. "Lower alkenyl" is an ...

... electron donating group; Introduce electron withdrawing groups chlorine, cyano, electron donating groups dimethyl, methoxy and neutral groups naphthyl, hydrogen ...

Especially preferred electron donating or/and electron withdrawing groups are halo or lower alkoxy, most preferred are fluoro or methoxy. These preferred ...

... electron withdrawing group and the methoxy group in para-position is selectively demethylated. In more preferred embodiment of the present ...

It is preferred that the at least one electron withdrawing or/and at least one electron donating group in R 3 is independently alkoxy, N-hydroxyamino, N- ...

Y 1 and Y 2 are independently hydrogen, or an electron donating or withdrawing group, and are preferably hydrogen, methoxy, carboxy or halogen, and most ...

As set forth therein, electron donating groups, such as a methoxy group, enhance anion decomposition process, whereas electron-withdrawing groups, such as ...

Wherein, R2 is selected from H or carbon - containing alkyl or methoxyl, ethoxyl electron-donating groups, or F, Cl, Br-containing electron-withdrawing groups.

3 shows a further comparison between benzyl alcohols bearing electron donating and electron withdrawing substituents. ... electron donating group is methoxy.

In the compounds of the present invention, the at least one electron withdrawing or/and at least one electron donating group is more preferably selected ...

Apr 26, 2022 ... The terms “electron-withdrawing” or “electron-donating” refer to the ability of a substituent to withdraw or donate electrons relative to that ...

One advantage of the compounds and methods described is a potential for drugs with enhanced electron donor properties that may be used at lower concentrations ...

Any of the foregoing is optionally substituted, e.g. by one or more electron withdrawing and/or electron donating groups. ... methoxy), hydroxy ...

2022. Enhancement of optical properties of new purine nucleobases containing electron-donating and-withdrawing peripheral groups ... methoxy group by a ...

Particularly preferred electron donating and / or electron withdrawing groups are halo or lower alkoxy, most preferably fluoro or methoxy. These preferred ...

... methoxy-3,5- dimethyl)pyridylmethyl ... The pyridine based fragments of the ligands can optionally comprise electron withdrawing or electron donating ...

... electron withdrawing group or an electron donating group. It can also give a high yield for strong electron-donating groups (eg: methoxy group); secondly ...

the functional groups Ri and R can be electron withdrawing or electron donating functional groups, for example methoxy, hydrogen, nitro, methyl, tertiary butyl, ...

the phenyl ring carrying an electron withdrawing group is invariably radiofluorinated in higher yields than its counterpart phenyl ring substituted with an ...

The aromatic group R 3 may be substituted with one or more electron donating substituents or electron withdrawing substitutents. ... methoxy phenol groups.