期刊
ACS CATALYSIS
卷 10, 期 4, 页码 2609-2614出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.0c00281
关键词
catalysis; bromine radical; photocatalysis; energy transfer; cycloaddition
资金
- Colorado State University
- National Institute of General Medical Sciences of the National Institutes of Health [R35GM119702]
We report here a mild, safe, and user-friendly bromine radical catalysis system that enables efficient [3 + 2] cycloaddition of diversely substituted vinyl- and ethynylcyclopropanes with a broad range of alkenes, including drug-like molecules and pharmaceuticals. Key to the success is the use of photosensitizing triplet-state beta-fragmentation of a judiciously selected precatalyst, cinnamyl bromide, to generate bromine radicals in a controlled manner using parts per million-level photocatalyst (i.e., 4CzIPN) loading.
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