Enzymatic asymmetrisation of prochiral α,α-disubstituted-malonates and -1,3-propanediols: formal asymmetric syntheses of (−)-aphanorphine and (+)-eptazocine
摘要:
Formal asymmetric syntheses of (-)-aphanorphine and (+)-eptazocine are reported via the two key intermediates 3a and 3b obtained in 94-97% ee, from the readily available chirons (R)-5 and (R)-9. Which resulting from enzyme-catalysed asymmetrisation of prochiral alpha,alpha-disubstituted-1,3-propanediols and -malonates respectively. (C) 1997 Elsevier Science Ltd. All rights reserved.
Enzymatic asymmetrisation of prochiral α,α-disubstituted-malonates and -1,3-propanediols: formal asymmetric syntheses of (−)-aphanorphine and (+)-eptazocine
摘要:
Formal asymmetric syntheses of (-)-aphanorphine and (+)-eptazocine are reported via the two key intermediates 3a and 3b obtained in 94-97% ee, from the readily available chirons (R)-5 and (R)-9. Which resulting from enzyme-catalysed asymmetrisation of prochiral alpha,alpha-disubstituted-1,3-propanediols and -malonates respectively. (C) 1997 Elsevier Science Ltd. All rights reserved.