METHOD FOR REMOVAL OF NUCLEIC ACID-PROTECTING GROUP
申请人:Kitagawa Hidetoshi
公开号:US20090312534A1
公开(公告)日:2009-12-17
A method is provided for efficiently removing the silicon substituent which protects the 3′-hydroxyl group and the 5′-hydroxyl group of a ribose of a ribonucleic acid derivative in which the 2′-hydroxyl group of the ribose is protected with the following substituent (I)
where WG1 represents an electron withdrawing group, and the 3′-hydroxyl group and the 5′-hydroxyl group of the ribose are protected with a silyl protecting group.
Method for detaching protecting group on nucleic acid
申请人:Nippon Shinyaku Co., Ltd.
公开号:US08158775B2
公开(公告)日:2012-04-17
The present invention provides a method for removing a 2-cyanoethoxymethyl (CEM) group, which substitutes the 2′-hydroxyl group of each ribose of an oligonucleic acid derivative, with good reproducibility and high efficiency. The present invention further provides a method for producing an oligonucleic acid derivative represented by the following general formula (11), characterized by using a sulfoxide-based solvent or an amide-based solvent or a mixture thereof as a reaction solvent in the step of removing a protecting group, which protects the 2′-hydroxyl group of each ribose of an oligonucleic acid derivative represented by the following general formula (10) by allowing TBAF to act on the oligonucleic acid derivative.
The present invention relates to a method for producing an oligonucleic acid derivative characterized by using a phenoxyacetic acid derivative anhydride as an acylating agent and a pyridine derivative as the acylation reaction activator, in a capping step for protecting the 5′-hydroxyl group of a ribose of an oligonucleic acid derivative.
On the Reactivity of Gulose and Guluronic Acid Building Blocks in the Context of Alginate Assembly
作者:Qingju Zhang、Erwin R. van Rijssel、Herman S. Overkleeft、Gijsbert A. van der Marel、Jeroen D. C. Codée
DOI:10.1002/ejoc.201600336
日期:2016.5
influence the outcome of glycosylation reactions in which they are involved. Our studies corroborate previous reports that identified the gulosyl C4-OH group as a relatively poor nucleophile. We did not find a major influence of the neighboring C5 functionality on the reactivity of the alcohols, and the gulose acceptors did not provide more productive glycosylation reactions than their guluronic acid counterparts