access S-heterocycles and mixed N,S-heterocycles via metal-mediated dominoreactions are described. One involves a cyclocarbopalladation/cross-coupling domino process and leads to benzene-fused five- or six-membered sulfur heterocycles with a stereo defined tetrasubstituted exocyclic double bond. The other consists in a three-component dominoreaction between 2-aminophenyl disulfide, copper cyanide
stereodefined tetrasubstituted exocyclic double bond. To illustrate the application of this method to the synthesis of bioactive molecules, a sulfur analogue of the anticancer agent tamoxifen was prepared as a potential selective estrogen-receptor modulator.
Gold(I)‐Catalyzed Carbothiolation via Rearrangement of S‐Propargyl Group: An Access to 3‐Allenyl or 3‐Indenyl Benzo[
<i>b</i>
]thiophenes
作者:Camille Van Wesemael、Nicolas Brach、Mihaela Gulea、Gaëlle Blond
DOI:10.1002/adsc.202201000
日期:2022.12.8
A series of 3-allenyl benzo[b]thiophenes were synthesized through a gold(I)-catalyzed domino reaction. The process consists in a 5-endo-dig cyclization with C−S bond formation and consecutive S-to-C propargyl migration via [3,3]-sigmatropic Claisen rearrangement. With aryl substituents on both triple bonds of the substrate, subsequent intramolecular hydroarylation on the formed allenyl system led to