42599-24-6Relevant articles and documents
Asymmetric Synthesis of γ-Lactams Containing α,β-Contiguous Stereocenters via Pd(II)-Catalyzed Cascade Methylene C(sp3)-H Alkenylation/Aza-Wacker Cyclization
Wu, Le-Song,Ding, Yi,Han, Ye-Qiang,Shi, Bing-Feng
, p. 2048 - 2051 (2021)
γ-Lactam containing α,β-contiguous stereogenic centers stands out as a pivotal motif in various bioactive compounds, while its efficient synthesis still needs to be enhanced. Herein, an asymmetric C-H activation strategy for accessing α,β-stereospecific γ-lactams in good yields (≤79%) with high enantio- and diastereoselectivities (≤96% ee and >20:1 dr) was described, which serves as an effective supplement to the existing strategies.
Stereostructure Clarifying Total Synthesis of the (Polyenoyl)tetramic Acid Militarinone B. A Highly Acid-Labile N-Protecting Group for Amides ?
Drescher, Christian,Brückner, Reinhard
supporting information, p. 6194 - 6199 (2021/08/18)
The 5S, 8′R, and 10′R configurations of militarinone B (3), which is a natural product from Paecilomyces militaris, should equal those in its biosynthetic precursor, militarinone C. The configuration at C-1′ emerged from syntheses of the militarinone B candidates 1′′S- and 1′′R-(5S,8′R,10′R)-3 from the building blocks 9, 11, 14, and 15a while introducing TMB as a more acid-labile N-protecting group for β-ketoamides than DMB. Comparisons of 1′′S- and 1′′R-(5S,8′R,10′R)-3 with natural militarinone B (3; reisolated from Nature) revealed identity versus distinctness.
Copper-Photocatalyzed Hydrosilylation of Alkynes and Alkenes under Continuous Flow
Zhong, Mingbing,Pannecoucke, Xavier,Jubault, Philippe,Poisson, Thomas
, p. 11818 - 11822 (2021/07/10)
Herein, the photocatalytic hydrosilylation of alkynes and alkenes under continuous flow conditions is described. By using 0.2 mol % of the developed [Cu(dmp)(XantphosTEPD)]PF6 under blue LEDs irradiation, a large panel of alkenes and alkynes was hydrosilylated in good to excellent yields with a large functional group tolerance. The mechanism of the reaction was studied, and a plausible scenario was suggested.