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All articles of this category 1,ω-Alkanediamines 1a-c or ω-aminoalcohols 5a-d adsorbed over alumina or montmorillonite K 10 react with ethyl levulinate [ethyl 4-oxopentanoate ( 2 )] under microwave irradiation to give, within a few minutes, compounds such as 7a-methyl-2,3,7,7a-tetrahydro-1 H -pyrrolo [1,2- a ]imidazol-5(6 H )-one ( 3a ) and 7a-methyl-2,3,7,7a-tetrahydropyrrolo[2,1- b ]oxazol-5(6 H )-one ( 6a ).
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Pilard et al. (1992) studied this question.
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