To develop a highly safe measure to treat Alzheimer's disease using a secretase-inhibiting substance, there is provided a compound represented by the following general formula (I) or a salt thereof:
wherein A represents a phenyl group or the like, R
1
represents a chlorine atom, a bromine atom, or a nitro group or the like, R
2
, R
3
, R
4
, and R
5
each represent a hydrogen atom or the like, and L represents CH
2
—CH
2
or CH═CH.
Silver-Catalyzed Tandem C≡C Bond Hydroazidation/Radical Addition/Cyclization of Biphenyl Acetylene: One-Pot Synthesis of 6-Methyl Sulfonylated Phenanthridines
作者:Jiawei Tang、Paramasivam Sivaguru、Yongquan Ning、Giuseppe Zanoni、Xihe Bi
DOI:10.1021/acs.orglett.7b01771
日期:2017.8.4
silver-catalyzed tandem carbon–carbon triple bond hydroazidation, radical addition, and cyclization of biphenyl acetylene is described under mild conditions, leading to the formation of 6-methyl sulfonylated phenanthridines in good yields. In this novel cascade reaction, most of the atoms are incorporated into the product without cleavage of the C≡C bond. Mechanistic studies suggest the reaction should proceed
Interplay between n→π* Interactions and Dynamic Covalent Bonds: Quantification and Modulation by Solvent Effects
作者:Hao Zheng、Hebo Ye、Xiaoxia Yu、Lei You
DOI:10.1021/jacs.9b01006
日期:2019.6.5
orbital interaction was then quantified through imine exchange, the equilibrium of which was successfully correlated with the difference in natural bond orbital stabilization energy of n→π* interactions of aldehyde and its imine. Moreover, the examination of solvent effects provided insights into the distinct feature of the modulation of n→π* interaction with aprotic and protic solvents. The n→π* interaction
In‐Fjord Substitution in Expanded Helicenes: Effects of the Insert on the Inversion Barrier and Helical Pitch
作者:Samuel Suárez‐Pantiga、Pablo Redero、Xaiza Aniban、Martin Simon、Christopher Golz、Ricardo A. Mata、Manuel Alcarazo
DOI:10.1002/chem.202102585
日期:2021.9.20
part of their fjord have been synthesized via sequential Au-catalyzed hydroarylation of appropriately designed diynes, and their racemization barriers have been calculated employing electronic structure methods. These show that the overall profile of the inversions (energies, number of transition states and intermediates, and their relative position) is intensively affected by the interplay of steric and