Asymmetric Sulfonium Ylide Mediated Cyclopropanation: Stereocontrolled Synthesis of (+)-LY354740
作者:Varinder K. Aggarwal、Emma Grange
DOI:10.1002/chem.200500693
日期:2006.1
were established as follows: use of a preformed ylide, absence of base, hindered ester (to reduce ylide-mediated betaine equilibration), and low concentration. Under these conditions high enantioselectivity (95 % ee) was achieved, albeit with low diastereocontrol. Our model for selectivity has been applied to other sulfonium ylide mediated cyclopropanation reactions and successfully accounts for the
crystallography of the inhibitors binding to the TACE enzyme demonstrates that each series derives its activity from the opposite enantiomer of the cyclopropyl scaffolds, which display almost superimposable hydroxamate groups that coordinate to the zinc at the catalytic site. Mode A inhibitors occupy the S1'-S3' binding pockets, whereas mode B resides in the nonprime binding sites.
Reactions of Sulfonium Salts with 2,3-Dioxopyrrolidine Derivatives: A Concise Synthesis of Spirocyclopropane
作者:Peng-Fei Xu、Shuang Zhang、Xiu-Qin Hu、Zhu-Yin Wang
DOI:10.1055/s-0034-1380522
日期:——
3-dioxopyrrolidine derivatives with sulfoniumsalts is described. This reaction enables a novel concise access to polysubstituted spirocyclopropane derivatives in good yields and with a trans/cis ratio of up to >20:1 under mild conditions. An efficient base-promoted spirocyclopropanation of 2,3-dioxopyrrolidine derivatives with sulfoniumsalts is described. This reaction enables a novel concise access to
SPIRO SUBSTITUTED CYCLOPROPANE COMPOUNDS FOR THE TREATMENT OF INFLAMMATORY DISORDERS
申请人:Kozlowski Joseph A.
公开号:US20090239890A1
公开(公告)日:2009-09-24
A compound of the Formula I:
or a pharmaceutically acceptable salt, solvate or isomer thereof, can be useful for the treatment of diseases or conditions mediated by MMPs, ADAMs, TACE, aggrecanase, TNF-α or combinations thereof.
A Cross‐Coupling Reaction Between Aliphatic Aldehydes And Sulfonium Salts
作者:Baoli Chen、Li Li、Jiean Chen、Yong Huang
DOI:10.1002/adsc.202100902
日期:2022.1.4
Herein, we report an organocatalytic protocol that enables the direct coupling of aliphaticaldehydes with sulfonium ylides. A key carbene mimetic, α-iodoenamine/enol, is believed to engage in direct cross-coupling with a sulfonium ylide, delivering α,β-unsaturated carbonyl compounds with a formyl substituent. The reaction demonstrated remarkably mild conditions, convergence, and control of olefin geometry