Abstract
A novel bidentate α-amino oxazolinyl directing group has been developed. Different from previous directing groups, this newly designed directing group was easily prepared from amino acids and modified in structure. This auxiliary preferentially effects functionalization at secondary C(sp(3) )-H bonds, rather than at aryl C(sp(2) )-H bonds. The diastereoselectivity of direct arylation between geminal secondary C(sp(3) )-H bonds in linear molecules has also been realized for the first time with a chiral directing group by remote chirality relay. Two diastereoisomers are produced with the same chiral source by changing the substituents of substrates and aryl halides.
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