摘要 已经从 Cirsium dipsacolepis 的根中分离出两种新的和六种已知的脂肪醛,即。7-辛烯醛、(2 E )-2,8-壬二烯醛、(2 E )-2,9-癸二烯醛、(2 E )-2,10-十一烯醛、(2 E ,4 E )-2,4,10 -十一碳三烯醛、(2 E ,4 E )-2,4,11-十二碳三烯醛、(2 Z ,4 Z )-2,4,11-十二碳三烯醛和 (2 E ,4 Z )-2,4,11-十二碳三烯醛. 从烷烃-α,ω-二炔中立体选择性地鉴定和合成醛。
catalytic allylic C-H fluorination reaction using a nucleophilic fluoride source is reported. Under the influence of a Pd/Cr cocatalyst system, simple olefin substrates undergo fluorination with Et3N·3HF in good yields with high branched:linear regioselectivity. The mild conditions and broad scope make this reaction a powerful alternative to established methods for the preparation of allylic fluorides
An object of the present invention is to develop and provide a method for efficiently producing a nucleic acid aptamer, particularly, a DNA aptamer, having higher specificity and binding activity against a target substance than those of nucleic acid aptamers obtained by conventional methods. The present invention provides a transcribable or replicable nucleic acid aptamer comprising a natural nucleotide and a non-natural nucleotide having an artificial base-pairable artificial base. The present invention also provides a method for sequencing a non-natural nucleotide-containing single-stranded nucleic acid molecule selected from a single-stranded nucleic acid library.
BICYCLIC NUCLEOSIDE INHIBITORS OF VARICELLA-ZOSTER VIRUS (VZV): EFFECT OF TERMINAL UNSATURATION IN THE SIDE-CHAIN
作者:Sheila Srinivasan、Christopher McGuigan、Graciela Andrei、Robert Snoeck、Erik De Clercq、Jan Balzarini
DOI:10.1081/ncn-100002425
日期:2001.3.31
As part of an ongoing research program, we have prepared novel bicyclic nucleoside inhibitors bearing long alkyl side-chains for evaluation against VZV. In particular, we report the synthesis of analogues with terminal unsaturation in the side-chain. Terminal alkenyl derivatives were found to be potent antivirals whereas the terminal alkynyls displayed poor activity.
Bicyclic nucleoside inhibitors of Varicella-Zoster virus (VZV)
作者:Sheila Srinivasan、Christopher McGuigan、Graciela Andrei、Robert Snoeck、Erik De Clercq、Jan Balzarini
DOI:10.1016/s0960-894x(00)00672-7
日期:2001.2
Novel bicyclic nucleoside analogues bearing long alkyl side chains are prepared and tested as inhibitors of VZV. In particular, analogues with terminal unsaturation in the side chain are reported. Whilst terminal alkenyl derivatives are potent antivirals, the corresponding terminal alkynyls are poorly active. (C) 2001 Elsevier Science Ltd. All rights reserved.