Tetrahedron letters

Free-radical annelation in the synthesis of bcyclic β-lactams. 6. Synthesis of tert-butyl 2-benzylidene-1-carbapenam-3-carboxylate

…, A De Mesmaeker, N Stevenart-De Mesmaeker

Index: Bachi; De Mesmaeker; Stevenart-De Mesmaeker Tetrahedron Letters, 1987 , vol. 28, # 25 p. 2887 - 2888

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Citation Number: 18

Abstract

... 9: ν (film) 1773, 1734 cm −1 . δ (CDCl 3 ) 1.50 (s, CMe 3 ), 2.63 (dddd, J = 17.2, 6.0, 2.6, 1.6Hz 1β-CH), 2.77 (ddd, J = 15.8, 1.9, 1.0Hz, 6β-CH), 3.22 (dddd, J= 17.2, 7.2, 2.0, 1.9Hz, 1α-CH), 3.45 (dd, J= 15.8, 4.9Hz, 6α-CH), 4.14 (m, 5α-CH), 4.98 (m, 3β-CH), 6.68 (m,