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2005
Hydroboration
O 0277
Hydroboration with Pyridine Borane at Room Temperature. — Activation of
Py·BH3 to I2 affords a stable hydroborating agent which shows high reactivity at room
37- 045 temperature.
Good functional group compatibility is found in hydroborations of monosubstituted alkenes. Complete conversion of ester, amide and amine substrates without
reduction is observed. However, ketones and carboxylic acids are not tolerated. Hydroboration of alkynes (VII) affords the corresponding ketones with different regioselectivity. — (CLAY, J. M.; VEDEJS*, E.; J. Am. Chem. Soc. 127 (2005) 16, 5766-5767;
Dep. Chem., Univ. Mich., Ann Arbor, MI 48109, USA; Eng.) — Bartels
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