A new colorimetric protecting group allowing deprotection under neutral conditions
摘要:
A 4,4'-dimethoxytrityl derivative of the levulinyl group has been developed for protection of nucleophilic functionalities such as hydroxyl groups by reaction of its symmetrical anhydride. It can rapidly be removed under mild conditions using a hydrazine-pyridinium acetate based buffer at near neutral pH. This protecting group can be detected with high sensitivity at 513 nm (epsilon = 78,600).
Design and Application of
<scp>
<i>m</i>
‐Hydroxybenzyl
</scp>
Alcohols in Regioselective (3 + 3) Cycloadditions of
<scp>2‐Indolymethanols</scp>
<sup>†</sup>
作者:Yi‐Cheng Shi、Xin‐Yu Yan、Ping Wu、Song Jiang、Ran Xu、Wei Tan、Feng Shi
DOI:10.1002/cjoc.202200503
日期:2023.1
of m-hydroxybenzyl alcohols has been designed as competent three-carbon building blocks and achieved their application in 2-indolylmethanol-involved regioselective (3 + 3) cycloadditions under the catalysis of Brønsted acids. By this appoach, a series of indole-fused six-membered cycloadducts have been synthesized in overall good yields (up to 98%) with excellent regioselectivity (all >95: 5 rr), thus
A new colorimetric protecting group allowing deprotection under neutral conditions
作者:Eckart Leikauf、Hubert Köster
DOI:10.1016/0040-4020(95)00228-z
日期:1995.5
A 4,4'-dimethoxytrityl derivative of the levulinyl group has been developed for protection of nucleophilic functionalities such as hydroxyl groups by reaction of its symmetrical anhydride. It can rapidly be removed under mild conditions using a hydrazine-pyridinium acetate based buffer at near neutral pH. This protecting group can be detected with high sensitivity at 513 nm (epsilon = 78,600).
Purification orientated synthesis of oligodeoxynucleotides in solution