http://talkchem.com Just about anything on chemistry Fri, 11 Jun 2010 10:42:18 +0000 http://wordpress.org/?v=2.9.2 en hourly 1 http://talkchem.com/uncategorized/preparation-of-sodium-triacetoxyborohydride.html http://talkchem.com/uncategorized/preparation-of-sodium-triacetoxyborohydride.html#comments Sat, 10 Apr 2010 08:41:59 +0000 Jyot Vakharia http://talkchem.com/uncategorized/preparation-of-sodium-triacetoxyborohydride.html Preparation of Sodium Triacetoxyborohydride. Preparation
from sodium borohydride in situ prior to reduction is
our preferred method. To NaBH4 (74 mg), suspended in ethyl
acetate (15 mL) and cooled with an ice-water bath, was added
glacial acetic acid (3.05 equiv) by syringe over approx. 5 min. Stirring
was continued for another 5 min until a clear solution was
formed. The solution is the ready-to-use reducing agent. For
large scale (3.5 g), the addition of acetic acid was performed
dropwise over approx. 30 min and stirring continued for a further
30 min.

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