UV-vis spectrum of trans-8a. ዊ UV-vis spectrum of cis-Z-16c.

Intermolecular CO-retained carbothiolation of alkynes using thioesters took place to afford beta-SR substituted enone derivatives; the choice of catalyst (Pd(dba)(2)-dppe) and the introduction of a CF(3) group into the thioesters are the key to achieving the transformation.

No abstract

Thioethers Q 0580Transition-Metal-Catalyzed Regioselective Aroyl-and Trifluoro-acetylthiolation of Alkynes Using Thioesters. -The decarbonylative arylthiolation of alkynes by thioesters is converted into CO-retained, regioselective carbothiolation simply by changing the catalyst from Pt(PPh3)4 to Pd(dba)2/dppe or by employing CF3CO as a carbon functionality of thioesters, even under Pt(PPh3)4-catalyzed conditions. -(MINAMI, Y.; KUNIYASU*, H.; MIYAFUJI, K.; KAMBE, N.; Chem. Commun. (Cambridge) 2009, 21, 3080-3082; Dep. Appl. Chem., Fac. Eng., Osaka Univ., Suita, Osaka 565, Japan; Eng.) -M. Paetzel 42-085