SENSITIVE OLIGONUCLEOTIDE SYNTHESIS USING SULFUR-BASED FUNCTIONS AS PROTECTING GROUPS AND LINKERS
申请人:Fang Shiyue
公开号:US20210032281A1
公开(公告)日:2021-02-04
Embodiments for the synthesis of sensitive oligonucleotides as well as insensitive oligonucleotides are provided. Sulfur-based groups are used for the protection of exo-amino groups of nucleobases, phosphate groups and 2′-OH groups, and as cleavable linker for linking oligonucleotides to a support. Oligonucleotide syntheses are achieved under typical conditions using phosphoramidite chemistry with important modifications. To prevent replacing sulfur-based protecting groups by acyl groups via cap-exchange, special capping agents are used. To retain hydrophobic tag to assist RP HPLC purification, special phosphoramidites are used in the last synthetic cycle. With the sulfur-based groups for protection and linking, oligonucleotide deprotection and cleavage are achieved via oxidation followed by beta-elimination under mild conditions. Therefore, besides for insensitive oligonucleotide synthesis, the embodiments of the invention are capable for the synthesis of oligonucleotide analogs containing sensitive functional groups that cannot survive the harsh conditions used in prior art oligonucleotide synthesis technologies.
Atmospheric Oxygen Mediated Radical Hydrothiolation of Alkenes
作者:Ruairí O. McCourt、Eoin M. Scanlan
DOI:10.1002/chem.202002542
日期:2020.12.4
hydrothiolation of alkenes (and alkyne) is reported. A variety of sulfur containing motifs including alkanethiols, thiophenols and thioacids undergo an atmospheric oxygen‐mediated radical hydrothiolation reaction with a plethora of alkenes in good yield with excellent functional group compatibility, typically with short reaction times to furnish a range of functionalized products. Biomolecules proved
l (Dmoc) as a protecting group and linker for oligodeoxynucleotide (ODN) synthesis, deprotection and cleavage are achieved under non-nucleophilic oxidative conditions. The nucleophile-sensitive thioester and α-chloroacetyl groups are conveniently incorporated into ODN sequences. The technology could be universally useful for electrophilic ODN synthesis.
Radical-mediated thiol–ene ‘click’ reactions in deep eutectic solvents for bioconjugation
作者:Mark D. Nolan、Andrea Mezzetta、Lorenzo Guazzelli、Eoin M. Scanlan
DOI:10.1039/d1gc03714e
日期:——
conditions, the thiol–ene reaction was applied to amino acid and peptideligation in DESs. The conditions facilitate highly-efficient synthesis of biomolecular targets using a ‘green’ methodology, with complete recycling of the reaction medium. Fluorescent labelling and glycosylation of a minimal sequence mimetic of angiotensin-converting enzyme 2 capable of binding the SARS-CoV-2 spike protein is demonstrated
A UCN-1028D derivative represented by the formula:
has protein kinase C inhibitory activity and is expected to be used as an active ingredient in anti-tumor agents, etc.
由式表示的 UCN-1028D 衍生物具有蛋白激酶 C 抑制活性,有望用作抗肿瘤剂等的活性成分:
具有蛋白激酶 C 抑制活性,有望用作抗肿瘤药物等的活性成分。