Thiols added easily to acetylenic compounds in the presence of Et3B to give alkenyl sulfides in good yields. The reaction of acetylenes with 3-methyl-2-buten-1-thio1 gave dihydro-thiophene derivatives in one pot.
A Novel Stereocontrolled Synthesis of Cis-Fused Bicyclic Lactams via [3 + 2]-Cycloaddition of Alkynyltungsten Complexes with Tethered Aziridines
作者:Reniguntala J. Madhushaw、Chu-Chen Hu、Rai-Shung Liu
DOI:10.1021/ol0201862
日期:2002.11.1
alkynyltungsten complexes with tethered aziridines in the presence of BF(3).Et(2)O led to [3 + 2]-cycloaddition reactions, affording bicyclic tungsten-enamine species stereoselectively. The stereochemistry of the resulting product reveals that ringopening of aziridine is initiated by S(N)2 attack of the tungsten fragment. Decomplexation of these organometallics with I(2) in CH(2)Cl(2), followed by hydrolysis
Nickel-Catalyzed Regioselective Hydrothiolation of Allenes Enabled by Visible-Light Photoredox Catalysis
作者:Hui Xie、Bernhard Breit
DOI:10.1021/acs.orglett.4c01027
日期:2024.5.31
Hydrothiolation presents an attractive way to transform allenes into allylic thioethers. Herein, we described an efficient visible-light photoredox-promoted nickel-catalyzed hydrothiolation of allenes with functionalized aromatic and aliphatic thiols. This synergistic catalytic system exhibits unprecedentedly high reactivities and regiocontrol for the construction of allylic thioethers, representing