IN DINITRATION OF p-DIHALOBENZENES **, Victoria
At present, SIBR is usually synthesized via anionic ter-polymerization of St, isoprene (Ip), and butadiene (Bd) with alkyl lithium initiators; however, anionic polymerization is not the proper one for the regioselectivity
to conjugated olefins .
in the Sonogashira coupling of 4,6-dichloro-2-pyrone.
This research proposal aims to develop direct transition metal-catalyzed functionalizations of C(sp3)H bonds in saturated nitrogen-based heterocycles, with a particular focus on compatibility with a very broad range of functional groups, regioselectivity
They also exhibit good chemoselectivity, regioselectivity
and enantioselectivity, and as hydrolases they do not require cofactors.
It is possible that the N192S substitution affects the regioselectivity
of CYP3A7 toward its substrates and thus is favored by natural selection.
Beyond determining that good regioselectivity
can be obtained for the first coupling, we also have developed conditions that enable a one-pot double Suzuki coupling.
We may conclude that the best regioselectivity
for oxygen insertion into Grieco lactone 1 was achieved by hydroboration of methylacetals 7a (ratio of regioisomers 4:1 in favour to C6 substitution).
A one-step enzyme-catalyzed polymerization produces polyesters from acid, hydroxyl, and/or carbohydrate building blocks with high regioselectivity
and without activating the diacid.
of the enzymatic transgalactosidation of D- and L -xylose catalysed by [beta]-galactosidases.
10:30 A COMPARISON OF SOLVENT EFFECTS ON THE REGIOSELECTIVITY
OF SINGLET OXYGEN ENE REACTIONS OF 2-METHYL-3-PHENYLTHIO-2-BUTENE AND 2-METHYL-3-PHENYLSULFONYL-2-BUTENE
of phase II metabolism of luteolin and quercetin by UDP-glucuronosyl tranferases.