摘要:
Serine was efficiently converted to the N-p-methoxybenzyl (PMB) protected alpha'-amino enone derivative 6, which was reduced with Zn(BH4)(2) to the corresponding anti-beta-amino alcohol in >96% de. On the other hand, N-PMB-N-Boc-protected alpha'-amino enone derivative 8 was reduced by NaBH4 to syn-product with a diastereoselectivity of ca. 90%. (C) 1999 Elsevier Science Ltd. All rights reserved.