期刊
ORGANIC LETTERS
卷 8, 期 17, 页码 3659-3662出版社
AMER CHEMICAL SOC
DOI: 10.1021/ol0609053
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资金
- NIGMS NIH HHS [GM-59157] Funding Source: Medline
A convenient method for the preparation of 2,5-dihydrofurans by using the chemistry of alkynyl(phenyl) iodonium salts is reported. Treatment of 3-alkoxy-1-alkynyl(phenyl) iodonium triflates with sodium benzenesulfinate generates an alkylidenecarbene, which undergoes [1,5]-C-H insertion to form 2-substituted 4-benzenesulfonyl-2,5-dihydrofurans in reasonable yield. These cyclic vinyl sulfones are functionalized in such a way as to make them useful starting materials for the preparation of lignans. The application of this methodology to the first total synthesis of (+/-)- magnofargesin is disclosed.
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