Production of optically pure organoboranes

Details Production of optically pure organoboranes Production of optically pure organoboranes

C - Chemistry, Metallurgy

07

F

260/614.5

C07F 5/02 (2006.01) C07C 29/48 (2006.01) C07C 35/06 (2006.01) C07C 35/08 (2006.01) C07C 35/30 (2006.01)

Patent

CA 1265536

Abstract A process for upgrading to essentially 100% enantiomeric excess the optical purity of an organoborane intermediate represented by the formulae: IpCBHR* or Ipc2BR* wherein Ipc is isopinocampheyl and R* is a unsubstituted or substituted, acyclic or cyclic alkyl having from 4 to 30 carbon atoms, compri,sing the steps of hydroborating cis- alkene, a trans-alkene or a tertiary-alkene with mono- isopinocampheylborane or diisopinocampheylborane, obtaining a solid organoborane and recrystallizing the solid organoborane to obtain an enantiomeric excess of essentially 100% ee of said organoborane.

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