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2005
Cycloaddition reactions
O 0070
Novel [2 + 2 + 2 + 1] Cycloaddition of Enediynes Catalyzed by Rhodium Com— The title novel reaction of enediynes and CO affording the corresponding
03- 042 plexes.
5-7-5 ring systems in high yield and selectivity is reported. The reaction tolerates ether,
sulfonamide, carbamate, ester, and ketal functional groups and methyl and Tms as the
substituent of the terminal acetylene moiety. The free alcohol functionality is not tolerated in this reaction. — (BENNACER, B.; FUJIWARA, M.; OJIMA*, I.; Org. Lett. 6
(2004) 20, 3589-3591; Dep. Chem., State Univ. N. Y., Stony Brook, NY 11794, USA;
Eng.) — Steudel
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