293313-39-0Relevant articles and documents
Complementary Reactivity of 1,6-Enynes with All-Metal Aromatic Trinuclear Complexes and Carboxylic Acids
Cecchini, Chiara,Lanzi, Matteo,Cera, Gianpiero,Malacria, Max,Maestri, Giovanni
, p. 1216 - 1224 (2019)
The distinct reactivity of 1,6-enynes in the presence of a trinuclear metal complex activated by a carboxylic acid is presented. The triplatinum catalyst enables the cyclization of the substrate and subsequent incorporation of a nucleophile in the final product. In contrast, sequential cyclization/double bond shift occurs under analogous conditions in the presence of the corresponding tripalladium complex.
Hydroxy- and Alkoxycyclizations of Enynes Catalyzed by Platinum(II) Chloride
Munoz, Ma. Paz,Mendez, Maria,Nevado, Cristina,Cardenas, Diego J.,Echavarren, Antonio M.
, p. 2898 - 2902 (2007/10/03)
The cyclization of 1-en-6-ynes catalyzed by PtCl2 in the presence of water or alcohols affords five or six-membered ring carbocycles containing hydroxy or alkoxy functional groups in high yields. The alkoxycyclizations can also be performed wit
(Alkylthio)alkynes as addends in the Co(0) catalyzed intramolecular pauson-khand reaction. Substituent driven enhancements of annulation efficiency and stereoselectivity
Pagenkopf, Brian L.,Belanger, David B.,O'Mahony, Donogh J. R.,Livinghouse, Tom
, p. 1009 - 1019 (2007/10/03)
Compared to terminal alkynes, (methylthio)alkynes are generally superior substrates for the thermally promoted, Co2(CO)8 catalyzed Pauson-Khand reaction of enynes and allenynes, providing enones in higher yields and with enhanced diastereoselectivity. Improvements in yield dependent upon the use of 2,2,2-trifluoroethanol as co-solvent and an apparent preference for endo selectivity with (ethoxy)alkynes are also disclosed.