Spontaneous Generation and Stereoselective Coupling of Co2(CO)6-Complexed Propargyl Radicals
Organic Letters2003Vol. 5(19), pp. 3395–3397
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Gagik G. Melikyan, Ferdinand Villena, Steve Sepanian, Michelle Pulido, Hagop Sarkissian, Arthur Florut
Abstract
[reaction: see text] The spontaneous generation and stereoselective coupling of Co(2)(CO)(6)-complexed propargyl radicals have been discovered. One- and two-step complementary methods (Method A: (1) HBF(4); (2) CH(2)Cl(2), 20 degrees C; Method B: Tf(2)O, CH(2)Cl(2), 20 degrees C) provided an easy access to synthetically useful d,l-3,4-diaryl-1,5-alkadiynes (de 74-98%).
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