A Chiral Benzyl Group as a Chiral Auxiliary and Protecting Group for the Synthesis of Optically Active 1,2-Diols and (+)-Frontalin
作者:Hee-Doo Kim、Tae Kim、Young-Kyo Kim、Zunhua Yang、Jung Jung、Lak Jeong
DOI:10.1055/s-0033-1340163
日期:——
Chelation-controlled asymmetric nucleophilic addition of a Grignard reagent to chiral α-benzyloxy ketones gives the corresponding alcohols with high diastereoselectivities (up to 96% de) by 1,4-asymmetric induction. A chiral benzyl group is used as a chiral auxiliary as well as a protecting group for the synthesis of optically active 1,2-diols and (+)-frontalin.
格氏试剂与手性 α-苄氧基酮的螯合控制的不对称亲核加成通过 1,4-不对称诱导产生具有高非对映选择性(高达 96% de)的相应醇。手性苄基用作手性助剂和保护基团,用于合成光学活性 1,2-二醇和 (+)-frontalin。