“…Me2BBr [11], Ph2BCl [12], (Me2N)2BCl [13], 2-Chlor-l,3-dimethyl-l,3,2-diazaborolidin [14], 1-Chlor-3-methylborolan [15], Et2NBCl2 [16], 2,2,6,6-Tetramethylpiperidinodichlorboran (TmpBCl2) [17], Me2S(0)NSiMe3 (2a) [18], Me:S(0)NH (2b) [18], (CH2)4S(NSiMe3)2 (3a) [2] und Me2S(NH) 2 (3c) [19] N ,N '-B is(l ,3-dim eth yl-l ,3,2-diazaborolidin-2-yl) …”