PIDA/I<sub>2</sub>-Mediated α- and β-C(sp<sup>3</sup>)–H Bond Dual Functionalization of Tertiary Amines
作者:Yu Zhu、Li-Dong Shao、Zhen-Tao Deng、Ying Bao、Xin Shi、Qin-Shi Zhao
DOI:10.1021/acs.joc.8b01424
日期:2018.9.7
The alpha,beta-C(sp(3))-H bond dual functionalization of tertiary amines is still a challenging task for both organic and medicinal chemists. Herein a direct, mild, metal-free, and site-specific method mediated by PIDA/I-2 was developed for alpha,beta-C(sp(3))-H bond dual functionalization of tertiary amines, and this method can provide facile access to alpha-keto lactams or rarely studied alpha,alpha-diiodo lactams. Moreover, this method was used for the effective syntheses of three natural products [obscurumine C (13), obscurumine O (17), and strychnocarpine (18)] and direct preparation of mimics of the in vivo metabolites of two FDA-approved drugs (imatinib and donepezil) in 36-60% overall yield. The method represents a promising protocol for the late-stage alpha,beta-C(sp(3))-H bond oxidative dual functionalization of tertiary amine-containing drugs and complex natural products.