Rh(I)-Catalyzed Allenic Pauson–Khand Reaction to Access the Thapsigargin Core: Influence of Furan and Allenyl Chloroacetate Groups on Enantioselectivity
作者:Eric D. Deihl、Luke T. Jesikiewicz、Logan J. Newman、Peng Liu、Kay M. Brummond
DOI:10.1021/acs.orglett.1c03951
日期:2022.2.4
Thapsigargin (Tg) is a potent SERCA pump inhibitor with the potential to treat cancer and COVID-19. We have extended the scope of the asymmetric allenicPauson–Khandreaction to furan-tethered allene-ynes, a stereoconvergent transformation affording the 5,7,5-ring system of Tg in good yields and high enantioselectivity. Computational studies of the oxidative cyclization step show that the furan and
The invention provides compounds of Formula (I) and pharmaceutically acceptable salts thereof, wherein Ya, Yb, R1, R2, and G are as described in the specification, as well as compositions comprising a compound of formula (I). The compounds are useful as inhibitors of bacterial RNA polymerase and as antibacterial agents.
alkenes containing a polarized double bond with an azolium-dienolate intermediate generated from α-bromo-α,β-unsaturated aldehydes without external oxidation of the Breslow intermediate. Heterocyclic cyclohexenones were produced in good isolated yields (typically about 90%) with good stereochemical outcomes (in most cases, dr > 20/1, and ee = 70–99%). The synthetic utility of the protocol was exemplified
COMPOSITION FOR REMOVING SULFUR-CONTAINING COMPOUND
申请人:Kuraray Co., Ltd.
公开号:EP3476478A1
公开(公告)日:2019-05-01
Provided is a composition for removing a sulfur-containing compound present in liquid or vapor, the sulfur-containing compound being hydrogen sulfide, an -SH group-containing compound or a mixture thereof, the composition containing an α,β-unsaturated aldehyde represented by the following general formula (1) as an active ingredient:
wherein R1 and R2 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms, or are connected to each other to represent an alkylene group having 2 to 6 carbon atoms; and R3 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, or is connected to R1 to represent an alkylene group having 2 to 6 carbon atoms.
Provided is a composition for removing iron sulfide, containing, as an active ingredient, an α,β-unsaturated aldehyde represented by the following general formula (1):
wherein R1 to R3 each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms, provided that R1 may be connected to R2 or R3, to constitute an alkylene group having 2 to 6 carbon atoms; and that R1 and R2 are not a hydrogen atom at the same time.