Visible-Light-Triggered C–C and C–N Bond Formation by C–S Bond Cleavage of Benzylic Thioethers
作者:Matteo Lanzi、Jérémy Merad、Dina V. Boyarskaya、Giovanni Maestri、Clémence Allain、Géraldine Masson
DOI:10.1021/acs.orglett.8b02196
日期:2018.9.7
The cleavage of sulfidic C–S bonds under visible-light irradiation was harnessed to generate carbocations under neutral conditions and synthesize valuable di- and triarylalkanes as well as benzyl amines. To this end, photoredox catalysis and direct photoinduced C–S bondcleavage are used as complementary approaches and participate in the versatility of the general strategy. Extensive mechanistic studies
Compounds having the structure:
are HIV reverse transcriptase inhibitors, wherein A, X, Y, Z, R
1
and R
2
are defined herein. The compounds and their pharmaceutically acceptable salts are useful in the inhibition of HIV reverse transcriptase, the prophylaxis and treatment of infection by HIV and in the prophylaxis, delay in the onset, and treatment of AIDS. The compounds and their salts can be employed as ingredients in pharmaceutical compositions, optionally in combination with other antivirals, immunomodulators, antibiotics or vaccines.
Reaction of potassium aryltrifluoroborates with aldehydes, in the presence of a rhodium catalyst, afforded carbinol derivatives in high yields under mild aqueous conditions; this efficient reaction proved to be general, allowing the production of highly hindered diarylmethanols and aliphatic aldehydes were also reactive under these conditions.
Palladium catalyzed isomerization of alkenes: a pronounced influence of an o-phenol hydroxyl group
作者:Jinmin Fan、Changfeng Wan、Qiang Wang、Linfeng Gao、Xiaoqi Zheng、Zhiyong Wang
DOI:10.1039/b907426k
日期:——
A novel palladium catalyzed isomerization of alkenes has been found, where an ortho-phenol hydroxyl group has a pronounced influence on the isomerization.
Functionalised organotitanium compounds: from lithium to titanium intermediates in chemoselective reactions with carbonyl compounds
作者:Isidro M Pastor、Miguel Yus
DOI:10.1016/s0040-4020(01)00103-x
日期:2001.3
The reaction of functionalised organolithium compounds 1 with an equimolecular mixture of two carbonyl compounds in the presence of 2 equiv. of triisopropoxytitanium chloride can discriminate between aldehyde and ketone, the process being selective for aldehydes at room temperature. Electronic and steric effects have been observed for different aldehydes.