<i>syn</i>-Selective Direct Catalytic Asymmetric Mannich-Type Reactions of Hydroxyketones Using Y{N(SiMe<sub>3</sub>)<sub>2</sub>}<sub>3</sub>/Linked-BINOL Complexes
作者:Mari Sugita、Akitake Yamaguchi、Noriyuki Yamagiwa、Shinya Handa、Shigeki Matsunaga、Masakatsu Shibasaki
DOI:10.1021/ol052384+
日期:2005.11.1
[reaction, structure: see text] Chiral YN(SiMe3)2}3/linked-BINOL catalyst generated Y-enolate in situ from various hydroxyketones (R2 = aryl, heteroaryl). Beta-amino-alpha-hydroxy ketones (R1 = aryl, heteroaryl, alkenyl) were obtained syn-selectively (up to 96/4) in high ee (up to 98%) and good yield (up to 98% yield).
[反应,结构:见正文]手性Y N(SiMe3)2} 3 /连接的BINOL催化剂由各种羟基酮(R2 =芳基,杂芳基)原位生成Y-烯醇盐。β-氨基-α-羟基酮(R1 =芳基,杂芳基,烯基)以高ee(最高98%)和良好的收率(最高98%的收率)同选择地获得(最高96/4)。