Addition reactions, of conjugated diene

Several types of Pd-catalyzed or -promoted reactions of conjugated dienes via TT-allylpalladium complexes are known. The Pd(II)-promoted oxidative difunctionalization reactions of conjugated dienes with various nucleophiles is treated in Chapter 3, Section 4, and Pd(0)-catalyzed addition reactions of conjugated dienes to aryl and alkenyl halides in this chapter. Section 1.1.1. Other Pd(0)-catalyzed reactions of conjugated dienes are treated in this section. 

Formation of O- and N-heterocycles by Pd-catalyzed intramolecular 1,4-addition reactions of conjugated dienes 92PAC429. 

The amount of 1,2- and 1,4-addition products formed in the electrophilic addition reactions of conjugated dienes depends greatly on the reaction conditions. 

Section 8.6 Electrophilic Addition Reactions of Conjugated Dienes... 

Among the techniques for C—C bond constmction, the Diels—Alder reaction has attained a preeminent position. It is a conjugate addition reaction of conjugated dienes to substituted alkenes, commonly called dienophiles, to form a substimted cyclohexene system (Fig. 14.10). The simplest example is the reaction of 1,3-butadiene with ethene to produce cyclohexene. 

When a,j8-unsaturated aldehydes and ketones react with nucleophilic reagents, they may do so in two ways. They may react by a simple addition, that is, one in which the nucleophile adds across the double bond of the carbonyl group or they may react by a conjugate addition. These two processes resemble the 1,2- and the 1,4-addition reactions of conjugated dienes (Section 13.10) ... 

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