Selected DCPs 1a,d,e,f,k underwent Michael addition with 4methoxythiophenol, affording the corresponding adducts 2a-e in good yields (65-70 %) (Scheme 2). These studies suggest a higher dependency on the amine substituent in position 4, comparing to the other substituent. In this way, mixed DCP allows the preparation of otherwise unattainable non-morpholine thioenaminones.