Tetrahedron Letters p. 337 - 340 (1989)
Update date:2022-08-02
Topics:
Joyeau, R.
Kobaiter, R.
Sadet, J.
Wakselman, M.
Treatment of N-alkyl or N-aryl 3-bromo-3-buteneamides undeer modified Ullman-Goldberg conditions results in the direct formation of highly strained N-substituted 4-methylene-azetidin-2-ones in fair to good yields.In the same manner, 4-(4'-bromobuten-3'-enyl) azetidinone derivatives provides carbacephems.
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(1987)
