be a strong hydride donor could deliver a hydride ion to less electron-rich arenes and heteroarenes in a nucleophilic manner. Deuterium labeling experiments supported a Michael-type reaction pathway. Theoretical analyses have been conducted to investigate the hydricity of the CoH species and the electrophilicity of the arenes.
已被证明是强氢化物供体的Co(P 4 N 2 )H 物种可以以亲核方式将氢阴离子传递给电子富集程度较低的芳烃和杂芳烃。氘标记实验支持迈克尔型反应途径。已进行理论分析以研究 CoH 物种的水合性和芳烃的亲电子性。
Process for the preparation of optically-active cyanomethyl esters
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0291626A2
公开(公告)日:1988-11-23
Stereoisomerically-enriched cyanomethyl esters are prepared by treating a non-symmetrical ketene or an alpha-chiral carboxylic acid halide or reactive derivative thereof with an optically-active alpha-hydroxynitrile. Certain optically-active optionally substituted S-alpha-cyano-3-phenoxybenzyl alcohol intermediates are prepared by treating the corresponding aldehyde or ketone with a source of hydrogen cyanide in the presence of a substantially water-immiscible, aprotic solvent and a cyclo(D-phenylalanyl-D-histidine) as a catalyst.
Compositions and methods for the simultaneous detection and quantification of multiple specific nucleic acid sequences
申请人:GEN-PROBE INCORPORATED
公开号:EP0709466A2
公开(公告)日:1996-05-01
The invention relates to methods for simultaneously or sequentially detecting multiple nucleic acid analytes in a single medium utilizing oligonucleotide hybridization probes coupled to different chemiluminescent labeling reagents. The methods may be used in a heterogeneous, homogeneous or non-homogeneous assay system. The invention also relates to specific combinations of chemiluminescent labeling reagents suitable, when coupled to an oligonucleotide probe, for use together in methods for the detection of multiple nucleic acid analytes. The invention also concerns kits useful in these methods.