in tetrahydrofuran; dimethyl sulfoxide addn. of 1 M soln. of C5H11B(OCH3)2 in THF to N-methyliminodiacetic acid in DMSO, stirring at 80-100°C for 2 h; control of completion of the reaction by (11)B-NMR, removing of solvent under vacuum (1-2.0 mm), treating with methanol, filtration, washing with ether;

methanol in dichloromethane; pentane under N2; to soln. of B complex in CH2Cl2 added pentane, cooled to -10 °C, slowly added alcohol, stirred for 15 min; upper layer sepd., lower layer extd. with cold (0 °C) pentane, combined ext. evapd. in vac., distd.;

(i) BCl3, BHCl2-Et2O, pentane, (ii) /BRN= 1098229/; Multistep reaction;

in methanol

(i) B2H6, THF, (ii) MeOH; Multistep reaction;

(i) B2H6, THF, (ii) /BRN= 1098229/; Multistep reaction;