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Novel Schiff bases of H4′-NOBIN 5a and 5b were synthesized by condensation of 3 with aldehydes. Compound 5b was structurally characterized by single-crystal X-ray diffraction. The asymmetric hetero-Diels-Alder reactions were carried out with high yields and good enan-tioselectivities in the presence of Ti-(S)-5a complex as catalyst. Crystallographic data for 5b: C27H22BrNO, Mr = 456.37, triclinic, space group P1 with a = 9.1618(2), b = 10.3836(2), c = 12.7718(2), α = 105.4860(10),β = 94.6360(10), γ = 108.4610(10)o, V = 1092.32(4)3, Z = 2, Dc = 1.388 g/cm3, μ = 1.900 mm-1, F(000) = 468, R = 0.0476 and wR = 0.1248 for 3092 observed reflections (Ⅰ > 2σ(Ⅰ)).
Novel Schiff bases of H4’-NOBIN 5a and 5b were synthesized by condensation of 3 with aldehydes. Compound 5b was structurally characterized by single-crystal X-ray diffraction. The asymmetric hetero-Diels-Alder reactions were carried out with high yields and good enan-tioselectivities in the presence of Ti- (S) -5a complex as catalyst. Crystallographic data for 5b: C27H22BrNO, Mr = 456.37, triclinic, space group P1 with a = 9.1618 (2), b = 10.3836 = 12.7718 2, α = 105.4860 (10), β = 94.6360 (10), γ = 108.4610 (10) o, V = 1092.32 (4) 3, Z = 2, Dc = 1.388 g / cm3, μ = 1.900 mm-1, F (000) = 468, R = 0.0476 and wR = 0.1248 for 3092 observed reflections (I> 2σ (I)).