Batrachotoxin Analogues, Compositions, Uses, and Preparation Thereof
申请人:Du Bois Justin
公开号:US20140171410A1
公开(公告)日:2014-06-19
Compounds relating to batrachotoxin are provided, in particular analogues that modulate the activity of sodium channels. Also provided are pharmaceutical compositions comprising compounds of the invention and a pharmaceutically acceptable carrier, including vehicles that modulate transdermal permeation of the compound. The subject compounds are useful in treatments, including treatments to reduce neuronal activity or to bring about muscular relaxation. The compounds also find use in the treatment of subjects suffering from a voltage-gated sodium channel-enhanced ailment or from pain. Further methods are provided for the preparation of the batrachotoxin-related compounds.
GEM-DISUBSTITUTED PYRROLIDINES, PIPERAZINES, AND DIAZEPANES, AND COMPOSITIONS AND METHODS OF MAKING THE SAME
申请人:California Institute of Technology
公开号:US20200199114A1
公开(公告)日:2020-06-25
Described here are transition metal-catalyzed enantioselective arylation and vinylation reactions of α-substituted lactams, such as γ-lactams. The use of various electrophiles and ligands are described, and result in the construction of α-quaternary centers in good yields (up to 91% yield) and high enantioselectivities (up to 97% ee).
Palladium-Catalyzed Decarboxylative Asymmetric Allylic Alkylation of 1,4-Diazepan-5-ones
作者:Zachary P. Sercel、Alexander W. Sun、Brian M. Stoltz
DOI:10.1021/acs.orglett.9b03530
日期:2019.11.15
We report the palladium-catalyzed asymmetricallylicalkylation of 1,4-diazepan-5-ones. This reaction proceeds smoothly to give gem-disubstituted diazepanone heterocycles bearing various functional groups in up to >99% yield and up to 95% ee. An electron-rich p-anisoyl lactam protecting group and the use of a nonpolar solvent proved crucial to obtaining high enantioselectivity in most cases. Additionally
Brønsted Acid-Catalyzed Aza-Ferrier Reaction of <i>N</i>,<i>O</i>-Allenyl Acetals: Synthesis of β-Amino-α-methylene Aldehydes
作者:Eiji Tayama、Yuki Ishikawa
DOI:10.1021/acs.joc.0c01047
日期:2020.7.17
A Tf2NH-catalyzed aza-Ferrier reaction of N,O-allenyl acetals was reported. This protocol provided various types of β-amino-α-methylene aldehydes as the products. The N,O-allenyl acetal substrates were easily prepared by base-induced isomerization of N,O-propargyl acetals with Triton B. The N,O-propargyl acetals were prepared from the corresponding aldehydes or lactams. Further synthetic applications
and scalable process for the preparation of multi-gram quantities of orthogonally protected bis(aminomethyl)malonic acid in good yield from readily available starting material is described. These orthogonally protected amino acids are important building blocks to make peptides based drugs, glycoconjugates, and in the total synthesis of peptide natural products. The newly developed route has only six