Ruthenium-Catalyzed Transfer Hydrogenation of Amino- and Amido-Substituted Acetophenones
作者:Andrew J. A. Watson、Antony J. Fairbanks
DOI:10.1002/ejoc.201301020
日期:2013.10
The ruthenium-catalyzedtransferhydrogenation of electron-rich amino-substituted acetophenones is reported. Variation of the reductant, ligands, base, and solvent allowed reaction optimization. A key discovery was the use of 1,4-butanediol as an irreversible reducing agent, which significantly improved the conversion. A range of amino- and amido-substituted aryl ketones were explored, and they all
Ruthenium(II)-Catalyzed Regioselective C–H Olefination of Aromatic Ketones and Amides with Allyl Sulfones
作者:Suman Dana、Chandan Kumar Giri、Mahiuddin Baidya
DOI:10.1021/acs.orglett.1c02424
日期:2021.9.3
of arenes with allyl sulfones leveraging the assistance of weakly coordinating ketone and amide functional groups is reported. It features a distinct reactivity profile in comparison to other allylic congeners, where β-sulfonyl elimination was not detected. The ambiphilic nature of the allyl sulfone side chain has also been demonstrated through intramolecular aza-Michael addition and aldol condensation
Site-Selective δ-C(sp<sup>3</sup>
)−H Alkylation of Amino Acids and Peptides with Maleimides via a Six-Membered Palladacycle
作者:Bei-Bei Zhan、Ya Li、Jing-Wen Xu、Xing-Liang Nie、Jun Fan、Liang Jin、Bing-Feng Shi
DOI:10.1002/anie.201801445
日期:2018.5.14
report on the site‐selective δ‐C(sp3)−H alkylation of amino acids and peptides with maleimides via a kinetically less favored six‐membered palladacycle in the presence of more accessible γ‐C(sp3)−H bonds. Experimental studies revealed that C−H bond cleavage occurs reversibly and preferentially at γ‐methyl over δ‐methyl C−H bonds while the subsequent alkylation proceeds exclusively at the six‐membered
MONOMETHYLVALINE COMPOUNDS CAPABLE OF CONJUGATION TO LIGANDS
申请人:Doronina Svetlana O.
公开号:US20090047296A1
公开(公告)日:2009-02-19
Auristatin peptides, including MeVal-Val-Dil-Dap-Norephedrine (MMAE) and MeVal-Val-Dil-Dap-Phe (MMAF), were prepared and attached to Ligands through various linkers, including maleimidocaproyl-val-cit-PAB. The resulting ligand drug conjugates were active in vitro and in vivo.
A compound of formula (I) or its enantiomers or diastereoisomers thereof:
wherein: A, X, W, R
1
, Y; R
3
; and R
4
are as defined herein.
The compounds of the invention may be used as inhibitors of the papilloma virus E1-E2-DNA complex. The invention further provides a method of treating or preventing human papilloma virus infection.