A Direct Catalytic Asymmetric Aldol Reaction of α-Sulfanyl Lactones: Efficient Synthesis of SPT Inhibitors
作者:Sho Takechi、Shigeo Yasuda、Naoya Kumagai、Masakatsu Shibasaki
DOI:10.1002/anie.201200520
日期:2012.4.23
Softly does it: The title reaction, catalyzed by a AgPF6/(R)‐biphep‐type ligand/DBU complex, is described (see scheme). This protocol gives efficient access to syn‐configured α‐sulfanyl‐β‐hydroxy lactones in a highly enantioselective manner. In one particular case, the sulfide group was stereospecifically replaced with a hydroxy group to afford an enantioenriched tertiary alcohol, which upon further
轻轻做它:标题反应,通过催化AgPF 6 /([R)-biphep基型配体/ DBU复杂,描述(参见方案)。通过该协议,可以以高对映选择性的方式有效访问合成的α-硫烷基-β-羟基内酯。在一个特定的情况下,将硫化物基团立体置换为羟基以提供对映体富集的叔醇,其在进一步操作后产生了一类致密官能化的SPT抑制剂。