Abstract
The iron-mediated diastereoselective spiroannelation of dimethyl aminomalonate opens up a highly efficient route to the 2-azaspiro[4.5]decane ring system.
Key words
cyclizations - Diels-Alder reactions - diene complexes - iron - spiro compounds
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11 Compound 7 : yellow crystals, mp 75 °C. Anal. Calcd for C24 H22 FeN2 O11 : C, 50.55; H, 3.89; N, 4.91; found: C, 50.39; H, 4.18; N, 4.86.
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15 Crystal data for anti -11 : C22 H24 N4 O7 , M = 456.45, orthorhombic, space group P bca (no. 61), a = 10.473 (8), b = 9.000 (5), c = 45.59 (2) Å, U = 4298 (4) Å3 , Z = 8, D
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