69790-20-1Relevant articles and documents
Hemilabile Benzyl Ether Enables Γ-C(sp3)-H Carbonylation and Olefination of Alcohols
Tanaka, Keita,Ewing, William R.,Yu, Jin-Quan
supporting information, p. 15494 - 15497 (2019/10/16)
Pd-catalyzed C(sp3)-H activation of alcohol typically shows β-selectivity due to the required distance between the chelating atom in the attached directing group and the targeted C-H bonds. Herein we report the design of a hemilabile directing group which exploits the chelation of a readily removable benzyl ether moiety to direct Γ- or δ-C-H carbonylation and olefination of alcohols. The utility of this approach is also demonstrated in the late-stage C-H functionalization of β-estradiol to rapidly prepare desired analogues that required multi-step syntheses with classical methods.
Iminyl Radical-Triggered Intermolecular Distal C(sp3)-H Heteroarylation via 1,5-Hydrogen-Atom Transfer (HAT) Cascade
Gu, Yu-Rui,Duan, Xin-Hua,Chen, Li,Ma, Zhi-Yong,Gao, Pin,Guo, Li-Na
supporting information, p. 917 - 920 (2019/02/14)
An efficient iron-catalyzed intermolecular remote C(sp3)-H heteroarylation of alkyl ketones has been developed via an iminyl radical-triggered 1,5-hydrogen-atom transfer (HAT) cascade. This protocol was amenable to a wide variety of alkyl ketones and heteroaryls, thus providing a straightforward method for the late-stage functionalization of alkylketones and heteroaryls.
Reactions of acylzirconocene chloride with nucleophiles: Bimodal reactivity at β- and acyl carbons of α,β-unsaturated acylzirconocene chloride
Hanzawa,Narita,Kaku-uchi,Taguchi
, p. 7525 - 7528 (2007/10/03)
Reactions of α,β-unsaturated acylzirconocene chloride with nucleophiles showed novel bimodal reactivity at the β- and acyl carbons depending upon the nucleophile employed, and the formation of ketone α,β-dianionic species was also observed. (C) 2000 Elsev