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hydrogenchloride; n-butyllithium in tetrahydrofuran

in dichloromethane a soln. of (CH3)2Sn(CCCH3)2 (4 mmol) in CH2Cl2 was cooled to -78°C and ((CH3)2CH)3B (4 mmol) added in one portion; the mixt. was warmed up to room temp. and stirred for 15 h (exclusion of water, under dry N2);; the solvent was removed in vac.; the remaining oils purified by distn. at 5E-2 torr; product mixt. obtained;;

in neat (no solvent) boiling;; product-mixture; formation of (B(n-C3H7)O)3 by isomerization of (B(i-C3H7)O)3;;

(tetra-i-butyl)diborane in diethyl ether at 100°C;; catalyst must be destroyed before distn. of solvent;

BF3*Bu2O; Diisopropylboran

(i), (ii) /BRN= 79763/, (iii) aq. H2O2, aq. NaOH; Multistep reaction;