Spahn, N.A., Nguyen, M.H., Renner, J., Lane, T.K. and Louie, J. (2017) Regioselective Iron-Catalyzed [2 + 2 + 2] Cycloaddition Reaction forming 4,6-Disubstituted 2-Aminopyridines from Terminal Alkynes and Cyanamides. Journal of Organic Chemistry, 82, 234-242.
https://doi.org/10.1021/acs.joc.6b02374

has been cited by the following article:

• TITLE: Rhodium Catalyzed [2π + 2π + 2π]-Cycloaddition of Alkynyl-Ynamides and Carbon Disulfide to Indolo-Thiopyrane Thiones

  AUTHORS: Benjamin Dassonneville, Felix Hinkel, Heiner Detert

  KEYWORDS: Cycloaddition, Heterocycles, Rhodium, Sulfur, Alkyne

  JOURNAL NAME: International Journal of Organic Chemistry, Vol.13 No.1, March 14, 2023

  ABSTRACT: The synthesis of new indoloannulated thiopyranethiones is reported. The key-step is a rhodium-catalyzed [2 + 2 + 2]-cycloaddition of alkynyl-ynamides with carbon disulfide to close the pyrrole and the thiopyranethione rings simultaneously. A violet idolothiopyrane thione or a mixture of the violet and a red isomer result from [RhCl(C8H14)2]2/3BINAP catalyzed cycloadditions, the regiochemistry is controlled by the substitution pattern on the alkynyl-ynamide.