| 摘要 |
<p>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 cisalkene, a trans-alkene or a tertiary-alkene with monoisopinocampheylborane or diisopinocampheylborane, obtaining a solid organoborane and recrystallizing the solid organoborane to obtain an enantiomeric excess of essentially 100% ee of said organoborane.</p> |
