Journal
ORGANIC LETTERS
Volume 18, Issue 11, Pages 2738-2741Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.6b01194
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Funding
- NSFC [21472239]
- Third Military Medical University
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A new formal [3 + 1]-cycloaddition reaction of azaoxyallyl cation intermediates', generated in situ from alpha-halo hydroxamates bearing alpha-alkyl groups, and sulfur ylides is reported, furnishing useful beta-lactams (dr >19:1) in fair to modest yields. In contrast, an unexpected formal [3 + 2]-cydoaddition reaction occurs to, give gamma-lactam derivatives for alpha-halo hydroxamates with alpha-aryl groups and sulfur ylides in the presence of bases.
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