Catalytic Asymmetric Addition of Dialkylzinc Reagents to α-Aldiminoesters
作者:Sandeep Basra、Michael W. Fennie、Marisa C. Kozlowski
DOI:10.1021/ol0602093
日期:2006.6.1
The first catalytic, enantioselectiveaddition of organozinc reagents to alpha-aldiminoesters is described. The use of a Lewis acid/Lewis base containing bifunctional catalyst preorganizes both reactive substrates to promote enantioselectiveaddition over the racemic background reaction and alternative addition modes. Alcohol additives were found to enhance the enantioselection. The addition product
Aryl Substituted Indoles and Their Use as Blockers of Sodium Channels
申请人:Kyle Donald J.
公开号:US20130296281A1
公开(公告)日:2013-11-07
The invention relates to aryl and heteroaryl substituted compounds of Formula (I), and pharmaceutically acceptable salts, prodrugs, or solvates thereof, wherein G, R
1
, and Z
1
-Z
5
are defined as set forth in the specification. The invention is also directed to the use of compounds of Formula (I) to treat a disorder responsive to the blockade of sodium channels. Compounds of the present invention are especially useful for treating pain.
An efficient approach to diarylethene-amino acid photochromic fluorescent hybrids
作者:Vitaly А. Podshibyakin、Еvgenii N. Shepelenko、Olga Yu. Karlutova、Lyudmila G. Kuzmina、Alexander D. Dubonosov、Vladimir A. Bren、Vladimir I. Minkin
DOI:10.1016/j.molstruc.2021.130758
日期:2021.11
quantum yield, decreases with the growth of solvent polarity. The ring-closed isomer C of stericallyhindered 5a (R2 = R3 = Me) is stable at room temperature, whereas for 5c (R3 = H), ring opening readily occurs with the speed increasing with the polarity of the solvent. The internal emission of stericallyhindered hybrids 5a, 6a and 7a (R2 = R3 = Me) is reversibly modulated in a binary response with
Orthogonally Protected Schöllkopf’s Bis-lactim Ethers for the Asymmetric Synthesis of α-Amino Acid Derivatives and Dipeptide Esters
作者:Steven Bull、Marc Hutchby、Adam Sedgwick
DOI:10.1055/s-0035-1561943
日期:——
the aza-enolates of orthogonally protected chiral bis-lactim ethers with electrophiles proceeds with good levels of diastereocontrol to afford trans-alkylated adducts that can be efficiently deprotected via hydrolysis/hydrogenation procedures to afford non-proteinogenic α-amino acid or dipeptide ester derivatives. Alkylation of the aza-enolates of orthogonally protected chiral bis-lactim ethers with electrophiles