Convergent synthesis of fluorescence-labeled probes of Annonaceous acetogenins and visualization of their cell distribution
摘要:
The convergent synthesis of fluorescence-labeled solamin, an antitumor Annonaceous acetogenin, was accomplished by two asymmetric alkynylations of 2,5-diformyl tetrahydrofuran with an alkyne tagged with fluorescent groups and another alkyne with an alpha,beta-unsaturated gamma-lactone. Assay for the growth inhibitory activity against human cancer cell lines revealed that the probe with the fluorescent groups at the end of the hydrocarbon chain may have the same mode of action as natural acetogenins. The merged fluorescence of dansyl-labeled solamin and MitoTracker Red suggests that Annonaceous acetogenins localize in the mitochondria. (C) 2010 Elsevier Ltd. All rights reserved.
Convergent synthesis of fluorescence-labeled probes of Annonaceous acetogenins and visualization of their cell distribution
摘要:
The convergent synthesis of fluorescence-labeled solamin, an antitumor Annonaceous acetogenin, was accomplished by two asymmetric alkynylations of 2,5-diformyl tetrahydrofuran with an alkyne tagged with fluorescent groups and another alkyne with an alpha,beta-unsaturated gamma-lactone. Assay for the growth inhibitory activity against human cancer cell lines revealed that the probe with the fluorescent groups at the end of the hydrocarbon chain may have the same mode of action as natural acetogenins. The merged fluorescence of dansyl-labeled solamin and MitoTracker Red suggests that Annonaceous acetogenins localize in the mitochondria. (C) 2010 Elsevier Ltd. All rights reserved.
Diethylzinc-Mediated Radical 1,2-Addition of Alkenes and Alkynes
作者:Xin Li、Songtao He、Qiuling Song
DOI:10.1021/acs.orglett.1c00669
日期:2021.4.16
A novel diethylzinc-mediated radical 1,2-addition of perfluoroalkyl iodides to unactivatedalkenes and alkynes is presented, which demonstrates a novel way to generate an ethyl difluoroacetate radical. This method is highly efficient and gives full conversions of the substrates, high yields of the products, and negligible byproducts and requires no column chromatography purifications. The mild conditions
The convergent synthesis of dansyl-labeled solamin, an antitumor Annonaceous acetogenin, has been achieved. The carbon skeleton was assembled from three fragments: the THF ring fragment, the fluorescent fragment, and the gamma-lactone fragment, by asymmetric alkynylation.