Treatment of 2,6-disubstituted-4-t-butylphenols with thallium(III) trifluoroacetate in either trifluoroacetic acid or carbon tetrachloride as solvent results in loss of the 4-t-butyl substituent as isobutene and formation in high yield of the corresponding 2,6-disubstituted p-quinones. Possible mechanisms for this novel reaction, which probably proceeds via the intermediacy of a hydroquinone or hydroquinone
Halogen‐Mediated Membrane Transport: An Efficient Strategy for the Enhancement of Cellular Uptake of Synthetic Molecules
作者:Harinarayana Ungati、Vijayakumar Govindaraj、Chithra R. Nair、Govindasamy Mugesh
DOI:10.1002/chem.201806122
日期:——
biological molecules require specific membrane transporters and channel proteins that control the traffic of these molecules into and out of the cell. This work reports that the introduction of halogen atoms into a series of fluorescent molecules remarkably enhances their cellular uptake, and that their transport can be increased to more than 95 % by introducing two iodine atoms at appropriate positions. The
Cross-Linking and Sequence Specific Alkylation of DNA by Aziridinyl Quinones. 2. Structure Requirements for Sequence Selectivity
作者:Rob H. J. Hargreaves、Stephen P. Mayalarp、John Butler、Simon R. McAdam、C. Caroline O'Hare、John A. Hartley
DOI:10.1021/jm960492j
日期:1997.1.1
The cytotoxicities and DNAsequence selectivity for guanine-N7 alkylation of 22 mono- and disubstituted 2,5-diaziridinyl-1,4-benzoquinones have been investigated. Several quinones produced patterns of alkylation following reduction with a selectivity for 5'-TGC-3' sequences. This sequence selectivity appeared to be dependent only on the presence of a hydrogen in position-6 of the quinone. A computer
Generation of skeletal diversity within a combinatorial library
申请人:——
公开号:US20040214232A1
公开(公告)日:2004-10-28
The present invention provides a method of synthesizing a library of chemical compounds with skeletal diversity. Two approaches are used to create skeletal diversity within a library of chemical compounds: (1) the “branching pathways” (or reagent-based) approach; and (2) the “folding pathways” (or substrate-based) approach. Upon exposure to certain reaction conditions the members of the library undergo unique transformations into a diverse collection of molecular skeletons, which can be functionalized and derivatized further to generate a large collection of unique, natural product-like compounds. A furan-based library synthesized using the folding pathways approach is provided, and a polycyclic library created using the braching pathways approach is also provided. The invention also provides materials, reagents, intermediates, and kits useful in the practice of the inventive method as well as method for screening the inventive compounds.