This reagent is prepared and used in situ at -78 °C in THF. B-Crotyldiisopinocampheylborane is prepared from B-Methoxydiisopinocampheylborane and either (Z)- or (E)-crotylpotassium. Because of the facile isomerization of allylic boranes, crotylborane reagents should be generated and reacted at -78 °C.
![Borane, (2Z)-2-buten-1-ylbis[(1R,2S,3R,5R)-2,6,6-trimethylbicyclo[3.1.1]hept-3-yl]-](/NewsImg/2025-01-06/6387176118085660936842265.png "Borane, (2Z)-2-buten-1-ylbis[(1R,2S,3R,5R)-2,6,6-trimethylbicyclo[3.1.1]hept-3-yl]-")
