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- W3100355216 abstract "Valery V. Fokin of Scripps/La Jolla extended (J. Am. Chem. Soc. 2010, 132, 2510) enantioselective Rh-mediated intermolecular cyclopropanation to α-olefins such as 1. Takahiro Nishimura and Tamio Hayashi of Kyoto University developed (Angew. Chem. Int. Ed. 2010, 49, 1638) a procedure for enantioselective intramolecular cyclopropanation, beginning with a propargyl sulfonamide 4. Gerhard Hilt of Philipps-Universität Marburg established (Organic Lett. 2010, 12, 1536) that an aryl alkyne 6 could add to cyclopentene to give the cyclobutene 7. Hajime Ito of Hokkaido University devised (J. Am. Chem. Soc. 2010, 132, 5990) a protocol for the borylation of an alkenyl silane 8 to give an intermediate α-lithio silane, which cyclized to the cyclobutane 9 with high diastereoconrol. Aryl alkenes worked as well. This same approach could be used to construct cyclopentanes and cyclohexanes. Zhi-Xiang Yu of Peking University showed (J. Am. Chem. Soc. 2010, 132, 4542) that the triene 10 cyclized to the cyclopentane 11 with high diastereocontrol. Yong Tang of the Shanghai Institute of Organic Chemistry optimized (Angew. Chem. Int. Ed. 2010, 49, 4463) a Cu catalyst for the enantioselective Nazarov cyclization of 12 to 13. The meso bis-carbonates 14 and 16 were prepared by singlet oxygenation of the inexpensive cyclopentadiene. Mark Lautens of the University of Toronto developed (J. Org. Chem. 2010, 75, 4056) a protocol for the enantioselective coupling of 14 to an arene boronic acid, giving the carbonate 15 with high enantiocontrol. Professor Ito devised (Angew. Chem. Int. Ed. 2010, 49, 560) a complementary procedure, coupling 16 with bis-pinacolatoborane to give an intermediate allylborinate, that then added to the aldehyde 18 to give 19 with high stereocontrol. It would be interesting to know if these procedures worked as well with the meso bis-carbonates derived from cyclohexadiene. Saim Özkar of Middle East Technical University prepared (J. Am. Chem. Soc. 2010, 132, 6541) Ru nanoclusters stabilized by a zeolite framework that effected hydrogenation of 20 at near ambient conditions, in contrast to the high pressure and temperature usually required." @default.
- W3100355216 created "2020-11-23" @default.
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- W3100355216 date "2013-02-21" @default.
- W3100355216 modified "2023-09-26" @default.
- W3100355216 title "Transition-Metal Catalyzed Ring Construction: The Yu Synthesis of α-Agorafuran" @default.
- W3100355216 doi "https://doi.org/10.1093/oso/9780199965724.003.0074" @default.
- W3100355216 hasPublicationYear "2013" @default.
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