Sonogashira coupling of the ethynyl monocarborane [CB11H11-12-C≡CH]−.
- Resource Type
- Article
- Authors
- Liu, Fan; Chen, Tao; Zhang, Kang; Jiang, Tao; Liu, Jiyong; Duttwyler, Simon
- Source
- Dalton Transactions: An International Journal of Inorganic Chemistry. 8/7/2022, Vol. 51 Issue 29, p10880-10886. 7p.
- Subject
- *FUNCTIONAL groups
*ZWITTERIONS
- Language
- ISSN
- 1477-9226
The Sonogashira cross coupling between the monocarborane cluster 12-ethynylmonocarba-closo-dodecaborate [CB11H11-12-C≡CH]− and bromoarenes under Pd catalysis has been developed, providing access to aryl carboranyl alkynes in yields of 42–95%. The transformations proceed under mild conditions and with high functional group tolerance using commercially available coupling partners. X-ray structural analyses and the identification of an unusual phosphonium zwitterion byproduct are reported as well. [ABSTRACT FROM AUTHOR]