A Catalytic Asymmetric Borono Variant of Hosomi-Sakurai Reactions with N,O-Aminals
作者:Yi-Yong Huang、Ananya Chakrabarti、Naohide Morita、Uwe Schneider、Shū Kobayashi
DOI:10.1002/anie.201105182
日期:2011.11.18
combination of indium(I) chloride and a chiral silver binol phosphate provides an excellent catalyst for asymmetric Hosomi–Sakurai reactions between N,O‐aminals and boronates (see scheme; PG=protecting group, pin=pinacolato). The substrate scope includes aromatic, heteroaromatic, and aliphatic N,O‐aminals as well as allyl and allenyl boronates.
氨醛吸引作用:氯化铟(I)和手性磷酸银酚醇的结合为N,O-氨醛与硼酸酯之间的不对称Hosomi-Sakurai反应提供了极好的催化剂(请参见方案; PG =保护基,pin =频哪醇)。底物的范围包括芳族,杂芳族和脂族N,O-缩醛以及烯丙基和烯丙基硼酸酯。