imines or pyrrole compounds. Harnessing the power of photocatalysis, we accomplished a straightforward synthesis of 3-oxazolin-5-ones from redox-active esters and secondary nitrocompounds. Visible light-induced nondecarboxylative coupling of a redox-active ester, nitro aldol condensation, and subsequent visible light-induced N-oxide deoxygenation were accomplished within 2 h. The reaction mechanism was
PARTICLES COMPRISING AMPHIPHILIC COPOLYMERS, HAVING A CROSS-LINKED SHELL DOMAIN AND AN INTERIOR CORE DOMAIN, USEFUL FOR PHARMACEUTICAL AND OTHER APPLICATIONS
申请人:G.D. Searle & Co.
公开号:EP0910351A1
公开(公告)日:1999-04-28
METHODS FOR ELECTROCHEMICAL DETECTION/QUANTIFICATION OF A NUCLEIC ACID
申请人:Gao Zhiqiang
公开号:US20100133117A1
公开(公告)日:2010-06-03
The invention provides methods and kits for the electrochemical detection and/or quantification of a target nucleic acid molecule by means of a detection electrode. In one method there is immobilized on the detection electrode a peptide nucleic acid (PNA) capture molecule, which has a nucleotide sequence that is at least partially complementary to at least a portion of the target nucleic acid molecule. The electrode is contacted with a solution expected to include the target nucleic acid molecule and the target nucleic acid molecule allowed to hybridize to the PNA, thereby allowing the formation of a complex between the PNA capture molecule and the target nucleic acid molecule. A polymerisable positively chargeable precursor is added, which associates to the complex formed between the PNA capture molecule and the target nucleic acid molecule. A suitable reactant molecule is added, initiating the polymerisation of the polymerisable positively chargeable precursor and the formation of an electroconductive polymer. An electrochemical measurement at the detection electrode is performed. In another method a nucleic acid capture molecule is immobilized on the electrode. In this method a polymerisable positively chargeable precursor, a suitable substrate molecule, and an enzyme attached to a detection probe nucleic acid molecule are used. The detection probe nucleic acid molecule is at least partially complementary to at least a portion of the target nucleic acid molecule. The detection probe hybridizes to a portion of the target nucleic acid that is different from the portion to which the capture nucleic acid molecule hybridises.