Palladium-Catalyzed Anti-Markovnikov Oxidation of Allylic Amides to Protected β-Amino Aldehydes
作者:Jia Jia Dong、Emma C. Harvey、Martín Fañanás-Mastral、Wesley R. Browne、Ben L. Feringa
DOI:10.1021/ja510163w
日期:2014.12.10
directly from protected allylic alcohols via palladium-catalyzed autotandem reactions, and the application of this method to the synthesis of β-peptide aldehydes is described. From a mechanistic perspective, we demonstrate that tBuOH acts as a nucleophile in the reaction and that the initially formed tert-butyl ether undergoes spontaneous loss of isobutene to yield the aldehyde product. Furthermore, tBuOH
Aryl- and heteroaryl-substituted urea compounds useful in the treatment of diseases and conditions related to DNA damage or lesions in DNA replication are disclosed. Methods of making the compounds, and their use as therapeutic agents, for example, in treating cancer and other diseases characterized by defects in DNA replication, chromosome segregation, or cell division also are disclosed.
Scavenger assisted combinatorial process for preparing libraries of amides, carbamates and sulfonamides
申请人:ELI LILLY AND COMPANY
公开号:EP0825164A2
公开(公告)日:1998-02-25
This invention relates to a novel solution phase process for the preparation of amide, carbamate, and sulfonamide combinatorial libraries. These libraries have utility for drug discovery and are used to form wellplate components of novel assay kits.
Facile N-Derivatization of α-Amino Esters and Amides via Benzotriazolylmethyl Derivatives
作者:Alan R. Katritzky、Nataliya Kirichenko、Boris V. Rogovoy、Hai-Ying He
DOI:10.1021/jo026622f
日期:2003.11.1
Alpha-(N-substitutedamino)esters were prepared in a two-step procedure from available unsubstituted alpha-amino esters. alpha-Amino esters are first converted into the corresponding N-benzotriazolylmethyl derivatives; in the second step, the benzotriazole group is substituted by various nucleophiles with or without the presence of a Lewis acid to give substituted alpha-amino esters in high overall
Aliphatic amino carboxylic and amino phosphonic acids, amino nitriles and amino tetrazoles as cellular rescue agents
申请人:Dyck E. Lillian
公开号:US20050159393A1
公开(公告)日:2005-07-21
Novel compounds of the formula I are described:
wherein:
R
1
=(CH
2
)
m
CH
3
where m is 0 or an integer in the range from 1 to 16, or an alkenyl, alkynyl, alkoxy, alkylthio, or alkyl sulfinyl group having from 2 to 17 carbon atoms,
R
2
=H, CH
3
or CH
2
CH
3
R
3
=H or CH
3
R
4
=H or CH
3
R
5
=lower alkyl having from 1 to 5 carbon atoms n is an integer in the range from 1 to 3,
and X is carboxyl (COOH) or carbalkoxy (COOR
5
), cyano (C≡N), phosphonic acid (PO
3
H
2
), phosphonate ester (PO
3
[R
5
]
2
) or 5-tetrazole, and pharmaceutically acceptable salts thereof. Preferably, the compounds are optically pure enantiomers of the R- or S-configuration in which R
3
=R
4
=R
5
=H, R
2
=CH
3
and R
1
is a saturated aliphatic chain of one to five carbon atoms. The compounds are useful as cellular rescue agents.