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Dihydrofurans from α-diazoketones: Facile rearrangement of donor-acceptor cyclopropanes

✍ Scribed by Elizabeth A. Lund; Isaac A. Kennedy; Alex G. Fallis

Book ID
104224877
Publisher
Elsevier Science
Year
1993
Tongue
French
Weight
283 KB
Volume
34
Category
Article
ISSN
0040-4039

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✦ Synopsis

The direct synthesis of diiydmfarans 7.11. and 23-25 from a-diioketones 3.8. and 20-22 is described. l%e cyclopropane iotermedtatcs 9caemted upon treahneait of the a-diazdretoms with metal catalysts in the presence of ethyl vinyl etha nxwnmged sponbmeou3ly. Sensitized llli&wl of 3 afforded 7 pills cyclobuuuwne 5 while direct pbotolysis gave tbe cyclobutanms 5, and 264.8.

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