Application of bioorthogonal hetero-Diels–Alder cycloaddition of 5-arylidene derivatives of 1,3-dimethylbarbituric acid and vinyl thioether for imaging inside living cells
作者:Bartłomiej Bazan、Aleksandra Pałasz、Łukasz Skalniak、Dariusz Cież、Szymon Buda、Katarzyna Jędrzejowska、Sonia Głomb、Daniel Kamzol、Kinga Czarnota、Krystian Latos、Krzysztof Kozieł、Bogdan Musielak
DOI:10.1039/d1ob00697e
日期:——
New bioorthogonal cycloaddition of 5-arylidene derivatives of 1,3-dimethylbarbituric acid as 1-oxa-1,3-butadienes and vinyl thioether as a dienophile has been applied to imaging inside living cells. The reaction is high yielding, selective, and fast in aqueous media. The proposed 1-oxa-1,3-butadiene derivative conjugated to a FITC fluorochrome selectively and rapidly labels the cancer cells pretreated
1,3-二甲基巴比妥酸的 5-亚芳基衍生物作为 1-氧杂-1,3-丁二烯和乙烯基硫醚作为亲二烯体的新生物正交环加成已应用于活细胞内成像。该反应在水介质中产率高、选择性强且快速。所提出的 1-oxa-1,3-丁二烯衍生物与 FITC 荧光染料缀合,可选择性地快速标记用亲二烯体紫杉醇预处理的癌细胞。各种提出的生物正交环加成的二阶速率常数k 2估计在 0.9 × 10 -2 M -1 s -1到 1.4 M -1 s -1的范围内,这比第一代 TQ 连接(邻喹啉酮醌甲基化物和乙烯基硫醚连接, k 2 = 1.5 × 10 −3 M −1 s −1 )与第二代 TQ 连接相当或更好( k 2 = 2.8 × 10 -2 M -1 s -1 )。所提出的连接反应的反应速率常数k 2在四嗪和降冰片烯或四嗪和环丙烯的速率常数k 2的范围内。 这些发现表明该化学物质适用于体外成像实验。