136066-30-3Relevant academic research and scientific papers
Synthesis of α-Methylene β-Lactones, Novel Heterocycles
Adam, Waldemar,Albert, Rainer,Grau, Nuria Dachs,Hasemann, Ludwig,Nestler, Bernd,et al.
, p. 5778 - 5781 (2007/10/02)
Triphenylphosphin deoxygenation of β-alkyl-, β,β-dialkyl-, and β,β-spirocycloalkyl-substituted α-methylene-β-peroxy lactones 3a-k, which are readily available by photooxygenation of the corresponding α,β-unsaturated carboxylic acids 1, and cyclization of the resulting α-methylene-β-hydroperoxy acids 2 constitute a convenient method for the preparation of a variety of α-methylene β-lactones 5.Alternatively, the α-methylene-β-hydroxycarboxylic acids 4 can be directly cyclized by benzenesulfonyl chloride in pyridine into these novel four membered ring heterocycles 5.
