Addition of allylzinc to α-amino acid-derived imines: synthesis of diamino alcohols by hydroboration
摘要:
Imines obtained by condensation of Z-protected or Boc-protected alpha-amino aldehydes with alpha-amino tert-butyl esters or with O-silyl-protected amino alcohols were reacted with preformed allyl zinc yielding homoallylamines with yields around 50% and selectivities ranging from 50: 50 to 90: 10. Hydroboration of the terminal double bond furnished diamino alcohols with yields up to 97%. The configuration of the substrates was determined by X-ray-crystallographic analysis of a hydroboration product and comparison of physical data.
1-Methylcarbapenem compounds having antibacterial activity, pharmacologically acceptable esters or salts thereof and pharmaceutical compositions (particularly antibacterial agents) containing them as an active ingredient are described. In addition, the invention includes the use of these compounds, ester derivatives or salts for the manufacture of pharmaceutical compositions, or a method for the prevention or treatment of diseases (particularly bacterial infections) by administering a pharmacologically effective amount of the compounds, ester derivatives or salts to warm-blooded animals (particularly human beings).
Imines obtained by condensation of Z-protected or Boc-protected alpha-amino aldehydes with alpha-amino tert-butyl esters or with O-silyl-protected amino alcohols were reacted with preformed allyl zinc yielding homoallylamines with yields around 50% and selectivities ranging from 50: 50 to 90: 10. Hydroboration of the terminal double bond furnished diamino alcohols with yields up to 97%. The configuration of the substrates was determined by X-ray-crystallographic analysis of a hydroboration product and comparison of physical data.