Iminium-Activated All-Carbon-Centered Reactions

SCHEME 1.77 Mechanism proposed for a one-pot Michael-aldol-Sjj2 cascade. 

Similar [3-1-3] reactions of a,p-unsaturated aldehydes initiated by iminium-medi-ated Michael addition, followed by aldol [120], Knoevenagel [121], or Wittig [122] reactions to generate 2-cyclohexenones, were also developed. 

SCHEME 1.79 Organocatalyzed asymmetric nitro-Michael/Henry cascade. 

SCHEME 1.80 Organocatalytic Michael-Moiita-Baylis-Hillman cascade. 

SCHEME 1.81 Mechanism proposed for the Michael-Morita-BayUs-HiUman cascade. 

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