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2005
Azetidine derivatives
R 0045
Microwave- and Photoirradiation-Induced Staudinger Reactions of Cyclic Imines
and Ketenes Generated from α-Diazoketones. A Further Investigation into the
22- 094 Stereochemical
Process. — The microwave-induced Staudinger reaction of imines (I),
(VII), and (X) gives trans-substituted β-lactams. The photochemically induced coupling provides trans-substituted β-lactams and/or pyrimidine derivatives. The reaction
proceeds via zwitterionic azabutadiene-type intermediates which exclusively undergo
conrotatory ring closure. — (LIANG, Y.; JIAO, L.; ZHANG, S.; XU*, J.; J. Org.
Chem. 70 (2005) 1, 334-337; Key Lab. Bioorg. Chem. Mol. Eng., Minist. Educ., Coll.
Chem., Peking Univ., Beijing 100871, Peop. Rep. China; Eng.) — Jannicke
2005
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