名称:
Synthesis of syn,syn; anti,syn; syn,anti; and anti,anti Stereotriads from a Single Pair of Enantiomeric Reagents
摘要:
The stannanes (S)-1a, (R)-1b, and (S)-1c add to (S)- and (R)-2-methyl-3-(benzyloxy)propanal ((S)-2 and (R)-2) to afford the syn,syn (BF3 . OEt(2) promotion), syn,anti (MgBr2 . OEt(2) promotion), anti,anti (SnCl4-derived reagent in CH2Cl2), and anti,syn (SnCl4-derived reagent in hexane) stereotriad adducts 3, 4, 6, and 7.