“…[45] Therefore, there have been considerable efforts to find alternative hydroborating agents. These include 4,4,6-trimethyl-1,3,2-dioxaborinane [6] (11) and pinacolborane [24,47,48,63 -65] (12), with emphasis on boron hydrides bearing boron -oxygen bonds, [39] as well as borazine [66,67] (13, Figure 1). Despite these endeavours, catecholborane (1) is still the most useful borane and rhodium complexes the most useful catalysts for catalytic hydroboration.…”