One-pot synthesis of α-phenylsulfinyl ketones by reaction of phenyl benzenethiosulfinate with enolate anions, and synthesis of sulfoxides and sulfides by its reaction with Grignard reagents
作者:Jerome Fakhry、David H. Grayson
DOI:10.1016/j.tet.2017.12.028
日期:2018.2
give α-phenylsulfinyl ketones directly, together with minor amounts of α-phenylsulfanyl ketones. These are easily separated by forming the water-soluble sodium salts of the sulfinyl compounds. Grignardreagents also react with phenyl benzenethiosulfinate, to give mixtures of sulfoxides and sulfides.
Novel and Efficient Insertions of Carbons Carrying O-, S-, and N-Linked Substituents: Synthesis of α-Alkoxyalkyl, α-(Alkylthio)alkyl, and α-(Carbazol-9-yl)alkyl Ketones
作者:Alan R. Katritzky、Linghong Xie、Larisa Serdyuk
DOI:10.1021/jo960840p
日期:1996.1.1
A wide variety of benzotriazolyl-stabilized anions 2, obtained by the lithiation of 1-(alpha-alkoxyalkyl)-, 1-[alpha-(alkylthio)alkyl]-, and 1-[alpha-(carbazol-9-yl)alkyl]benzotriazoles 1, on reaction with aliphatic and aromatic aldehydes and ketones, followed by rearrangement induced by heating in the presence of zinc bromide, furnish one-carbon-homologated alpha-alkoxyalkyl, alpha-(alkylthio)alkyl
Organocatalytic Selective [3 + 2] Cycloadditions: Synthesis of Functionalized 5-Arylthiomethyl-1,2,3-triazoles and 4-Arylthio-1,2,3-triazoles
作者:G. Surendra Reddy、L. Mallikarjuna Reddy、A. Suresh Kumar、Dhevalapally B. Ramachary
DOI:10.1021/acs.joc.0c02247
日期:2020.12.4
respectively, in a regioselective manner with high yields/rates. With controlled and online NMR experiments, we proved that the reaction path is following the organocatalytic enolization through selective deprotonation followed by a [1,3]-H shift. Surprisingly, the [3 + 2] cycloaddition of aryl/vinyl/alkyl azides with the in situ-generated equilibrated thermodynamic ↔ kinetic enolates furnished the highly
Organocatalytic asymmetric tandem condensation–intramolecular rearrangement–protonation: an approach to optically active α-amino thioester derivatives
作者:Francesca Capitta、Angelo Frongia、Pier Paolo Piras、Patrizia Pitzanti、Francesco Secci
DOI:10.1039/c1ob06623d
日期:——
An unprecedented and conceptually novel chiral Brønsted base/Brønsted acid catalytic method for the enantioselective synthesis of α-amino thioesters through a tandem condensation–intramolecular rearrangement–protonation has been developed which provides a number of important synthetic building blocks in good yield and with moderate to good enantioselectivities.
A facile and efficient protocol for the α-benzoyloxylation of β-keto sulfides is presented. This methodology provides a step-economical, mild and practical access to highly functionalized α-O-benzoyloxy substituted β-keto sulfides, including those with quaternary carbons, which are not easily obtained through currently available methods.