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The reaction of ethyl carbamate with cyclohexene promoted by PdCl2 gave ethyl 1-cyclohexenylcarbamate. The reaction of ethyl carbamate and tetrahydrofuran gave ethyl 2-tetrahydrofurylcarbamate. Ethyl carbamate and 1,5-cyclooctadiene–PdCl2 complex (4) reacted to give ethyl 4-cyclooctenylcarbamate. The reaction of urea and 4 afforded cyclooctylurea and 4-cyclooctenylurea.
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Ozaki et al. (1978) studied this question.
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