Use of Strain-Release for the Diastereoselective Construction of Quaternary Carbon Centers
作者:Tobias Pinkert、Mowpriya Das、Malte L. Schrader、Frank Glorius
DOI:10.1021/jacs.1c03492
日期:2021.5.26
formation of quaternary carbon centers with excellent diastereoselectivity via a strain-release protocol. An organometallic species is generated by Cp*Rh(III)-catalyzed C–H activation, which is then coupled with strained bicyclobutanes (BCBs) and a prochiral carbon electrophile in a three-component reaction. This work illustrates a rare example of BCBs in transition metal catalysis and demonstrates their
energy-transfer enabled highly regioselective intermolecular aminocarboxylation reaction for the single-step installation of both amine and ester functionalities into alkenes or (hetero)arenes. A bifunctional oxime oxalate ester was developed to simultaneously generate C-centred ester and N-centred iminyl radicals. This mild method features a remarkably broad substrate scope (up to 140 examples) and excellent tolerance
β-氨基酸经常被发现是许多生物活性分子、药物和天然产物中的重要成分。特别是,由于它们提高了代谢稳定性,它们被广泛用于构建生物活性肽和肽模拟物。尽管建立了许多用于制备 β-氨基酸衍生物的方法,但这些方法中的大多数都需要金属介导的预功能化底物的多步操作。在这里,我们公开了一种无金属、能量转移的高区域选择性分子间氨基羧化反应,用于将胺和酯官能团单步安装到烯烃或(杂)芳烃中。开发了一种双功能肟草酸酯以同时产生以 C 为中心的酯和以 N 为中心的亚氨基自由基。
Catalyzed insertion reactions of substituted α-diazoesters. A new synthesis of cis-enoates
作者:Nobuo Ikota、Norio Takamura、Stanley D. Young、Bruce Ganem
DOI:10.1016/s0040-4039(01)82093-1
日期:——
Synthesis of polynitrocyclobutane derivatives
作者:T. G. Archibald、L. C. Garver、K. Baum、M. C. Cohen
DOI:10.1021/jo00273a019
日期:1989.6
IKOTA, NOBUO;TAKAMURA, NORIO;YOUNG, S. D.;GANEM, B., TETRAHEDRON LETT., 1981, 22, N 42, 4163-4166
作者:IKOTA, NOBUO、TAKAMURA, NORIO、YOUNG, S. D.、GANEM, B.