Construction of the 1,5-Benzodiazepine Skeleton from <i>o</i>-Phenylendiamine and Propargylic Alcohols via a Domino Gold-Catalyzed Hydroamination/Cyclization Process
The gold-catalyzed reaction of o-phenylendiamine with propargylic alcohols affords 1,5-benzodiazepines bearing different substituents on the 2 and 4 positions. The method allows even for the selective preparation of 4-substituted 1,5-benzodiazepine derivatives.
A novel ytterbium(III) trifluoromethanesulfonate [Yb(OTf)3]‐catalyzed ring‐opening C(sp3)−N bond formation reaction of benzoxazole with propargylic alcohols was established. This reaction uses readily available starting materials and is operationally simple; it thus represents a practical method for the construction of highly functionalized substituted benzenes bearing aldehyde, propargylamine, and
A tandem annulation of arylpropynols with disulfides has been developed for the synthesis of 2-sulfenylindenone derivatives. The reaction pathway involves one-pot tandem Meyer–Schusterrearrangement of arylpropynols and successive radical cyclization with disulfides. Various arylpropynols and disulfides with a number of functional groups are compatible in this reaction that affords the corresponding