“…Conversely, the addition of phenylboronic acid was evaluated for four different 3-azaarylpropenones as substrates, hereafter called 1 ((E)-1-phenyl-3-(pyridin-2-yl)prop-2-en-1-one), 2 ((E)-1-phenyl-3- and 4 ((E)-3-(1-methyl-1H-imidazol-4-yl)-1-phenylprop-2-en-1-one) respectively. 26 In order to get a prognostic insight into the reactivity of different rhodium based catalytic systems in this type of reaction, we employed diphophine ligands characterized by varied types of chirality: phosphorus based ligands bearing only an atropoisomeric chirality as in (S)-TetraMe-BITIANP (L1) and (S)-BITIANP (L2), 23,27 ; diphosphines endowed with a mixed chirality (both sp 3 and atropoisomeric) as in (S,S,Sax)-DIOPHEP (L3) 28 and (R,Rax)-ISAPHOS C1 (L4) and (S,Rax,Rax)-ISAPHOS C2 (L5) 29,30 ; or only a sp 3 chirality as in the case of (R,R)-ZEDPHOS (L6). 20 Table 1.…”