Site‐Specific Alkene Hydromethylation via Protonolysis of Titanacyclobutanes
作者:James A. Law、Noah M. Bartfield、James H. Frederich
DOI:10.1002/anie.202103278
日期:2021.6.21
Methyl groups are ubiquitous in biologically active molecules. Thus, new tactics to introduce this alkyl fragment into polyfunctional structures are of significant interest. With this goal in mind, a direct method for the Markovnikov hydromethylation of alkenes is reported. This method exploits the degenerate metathesis reaction between the titanium methylidene unveiled from Cp2Ti(μ-Cl)(μ-CH2)AlMe2
Spiro[3.3]heptane as a Saturated Benzene Bioisostere**
作者:Kateryna Prysiazhniuk、Oleksandr P. Datsenko、Oleksandr Polishchuk、Stanislav Shulha、Oleh Shablykin、Yelyzaveta Nikandrova、Kateryna Horbatok、Iryna Bodenchuk、Petro Borysko、Dmytro Shepilov、Iryna Pishel、Vladimir Kubyshkin、Pavel K. Mykhailiuk
DOI:10.1002/anie.202316557
日期:2024.2.26
The spiro[3.3]heptane core, with the non-coplanar exit vectors, was shown to be a saturated benzene bioisostere. This scaffold was incorporated into the anticancer drug sonidegib (instead of the meta-benzene), the anticancer drug vorinostat (instead of the phenyl ring), and the anesthetic drug benzocaine (instead of the para-benzene). The patent-free saturated analogs obtained showed a high potency