Synthesis of 2,4- and 2,5-Disubstituted Oxazoles via Metal- Catalyzed Cross-Coupling Reactions
作者:Carla M. Counceller、Chad C. Eichman、Nicolas Proust、James P. Stambuli
DOI:10.1002/adsc.201000668
日期:2011.1.10
The rapid synthesis of 2,4‐ and 2,5‐disubstituted oxazoles via metal‐catalyzed cross‐coupling reactions is reported. The 4‐ or 5‐position of the corresponding 4‐ or 5‐halogenated 2‐butylthiooxazoles was successfully functionalized via Suzuki–Miyaura, Sonogashira and Stille cross‐coupling reactions. The 2‐position of the 2‐butylthiooxazoles obtained was further coupled to various organozinc reagents
据报道,通过金属催化的交叉偶联反应可以快速合成2,4-二和2,5-二取代的恶唑。通过Suzuki-Miyaura,Sonogashira和Stille交叉偶联反应,成功地将相应的4或5卤代2丁基硫代恶唑的4或5位官能化。通过钯或镍介导的交叉偶联反应,将获得的2-丁基硫代恶唑的2-位进一步与各种有机锌试剂偶联。