Preparation and Intramolecular [2+ 2]-Photocycloaddition of 1, 5-Dihydropyrrol-2-ones and 5, 6-Dihydro-1 H-pyridin-2-ones with C-, N-, and O-linked Alkenyl Side …
D Albrecht, B Basler, T Bach
Index: Albrecht, Dominik; Basler, Birte; Bach, Thorsten Journal of Organic Chemistry, 2008 , vol. 73, # 6 p. 2345 - 2356
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Citation Number: 26
Abstract
The 1, 5-dihydropyrrol-2-ones 2, 6, 9, and 11 were prepared from methyl tetramates (1a-c), N-Boc-protected tetramic acid (3), or N-Boc-protected tetramic acid bromide (7) in short reaction sequences and in very good overall yields. The homologous 5, 6-dihydro-1 H- pyridin-2-ones 16, 18, 20, 21, 23, and 27 were prepared along analogous routes starting from piperidin-2, 4-dione (19) or from its N-tert-butyl derivative 15. Optimized conditions for ...
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