Tetrahedron Letters p. 775 - 778 (1986)
Update date:2022-07-29
Sawada, Hiroyuki
Webb, Michael
Stoll, A. Timothy
Negishi, Ei-ichi
The reaction of 1-iodo-3-bromopropene derivatives (1) with lithium enolates of N,N-dialkylcarboxamides followed by treatment of the allylation product (2) with two equiv of t-BuLi cleanly provides cyclopentenones in high yields, while the corresponding cycliacylation reaction of 6-iodo-5-hexenamides provides cyclohexenones.
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