期刊
CHEMICAL SCIENCE
卷 10, 期 26, 页码 6437-6442出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9sc00735k
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资金
- Ministry of Education, Taiwan [MOE 106N506CE1]
- Ministry of Science and Technology, Taiwan [MOST 107-3017-F-007-002]
Gold-catalyzed bicyclic annulations of 4-methoxy-1,2-dienyl-5-ynes with isoxazoles afford indolizine derivatives with a structural rearrangement. The mechanism of these new annulations does not involve alpha-imino gold carbenes generated from gold pi-alkyne intermediates. We postulate alkyne attack on gold pi-allenes, yielding vinyl gold carbenes. These newly generated carbenes react with isoxazole derivatives to yield Z-3-imino-2-en-1-als, further enabling sequential cyclizations to deliver indolizine derivatives in two distinct classes.
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