Design of Experiments on the Transesterification of tris(p-nitrophenyl) Phosphate with Sodium Methoxide
作者:Rafael C. Seiceira、Hatumi T. Nakayama、Claudio Costa Neto、João F. Cajaiba da Silva、Marcelo S. Pedrosa
DOI:10.1080/104265090509171
日期:2005.2
reaction yielding bis(p-nitrophenyl) methyl phosphate. It was demonstrated that the temperature has a small effect on the reaction yield between 5 and 30ˆC. An important effect was observed with regard to the addition time of reagents and yield: when the tris(p-nitrophenyl)phosphate is added to the methoxide solution (58% on average) while no effect was observed when the methoxide solution was added to the
Enhanced triple-helix and double-helix formation with oligomers containing modified pyrimidines
申请人:——
公开号:US20030170680A1
公开(公告)日:2003-09-11
Novel oligomers are disclosed which have enhanced ability with respect to forming duplexes or triplexes compared with oligomers containing only conventional bases. The oligomers contain the bases 5-(1-propynyl)uracil, 5-(1-propynyl)cytosine or related analogs. The oligomers of the invention are capable of (i) forming triplexes with various target sequences such as virus or oncogene sequences by coupling into the major groove of a target DNA duplex at physiological pH or (ii) forming duplexes by binding to single-stranded DNA or to RNA encoded by target genes. The oligomers of the invention can be incorporated into pharmaceutically acceptable carriers and can be constructed to have any desired sequence, provided the sequence normally includes one or more bases that is replaced with the analogs of the invention. Compositions of the invention can be used as pharmaceutical agents to treat various diseases such as those caused by viruses and can be used for diagnostic purposes in order to detect viruses or disease conditions.
Pyrimidine derivatives for labeled binding partners
申请人:——
公开号:US20030176677A1
公开(公告)日:2003-09-18
Compounds having structure (1)
1
wherein R
1
is —H a protecting group, a linker or a binding partner; and R
2
and R
34
are as defined in the specification. The invention also provides intermediates and methods make the structure (1) compounds, as well as methods to use the compounds as labels in diagnostic assays and to enhance binding to complementary bases.
ENHANCED TRIPLE-HELIX AND DOUBLE-HELIX FORMATION WITH OLIGOMERS CONTAINING MODIFIED PYRIMIDINES
申请人:——
公开号:US20040265802A9
公开(公告)日:2004-12-30
Novel oligomers are disclosed which have enhanced ability with respect to forming duplexes or triplexes compared with oligomers containing only conventional bases. The oligomers contain the bases 5-(1-propynyl)uracil, 5-(1-propynyl)cytosine or related analogs. The oligomers of the invention are capable of (i) forming triplexes with various target sequences such as virus or oncogene sequences by coupling into the major groove of a target DNA duplex at physiological pH or (ii) forming duplexes by binding to single-stranded DNA or to RNA encoded by target genes. The oligomers of the invention can be incorporated into pharmaceutically acceptable carriers and can be constructed to have any desired sequence, provided the sequence normally includes one or more bases that is replaced with the analogs of the invention. Compositions of the invention can be used as pharmaceutical agents to treat various diseases such as those caused by viruses and can be used for diagnostic purposes in order to detect viruses or disease conditions.
This invention relates to a process for preparing 2-(aminoalkylthio)carbapenems. In particular, this invention relates to a process in which a bis(substituted phenyl) phosphorohalidate is used to form an enol phosphate intermediate that can be converted to 2-(aminoalkylthio)carbapenems by reaction with suitable thioalkylamines.