Synthesis of carbon-11 labeled fluorinated 2-arylbenzothiazoles as novel potential PET cancer imaging agents
作者:Min Wang、Mingzhang Gao、Bruce H. Mock、Kathy D. Miller、George W. Sledge、Gary D. Hutchins、Qi-Huang Zheng
DOI:10.1016/j.bmc.2006.08.026
日期:2006.12
benzyl ether group of compound 6a using H(2)/Pd-C provided the precursor 4-fluoro-2-(3-hydroxy-4-methoxyphenyl)benzothiazole (7) for radiolabeling. Synthesis of radiolabeling precursors and the reference standards 5- and 6-fluorinated arylbenzothiazoles (11c-n) was achieved via the reaction of o-aminothiophenol disulfides with substituted benzaldehydes under reducing conditions. The target radiotracers carbon-11
Trimethylphosphate as a Methylating Agent for Cross Coupling: A Slow-Release Mechanism for the Methylation of Arylboronic Esters
作者:Zhi-Tao He、Haoquan Li、Alexander M. Haydl、Gregory T. Whiteker、John F. Hartwig
DOI:10.1021/jacs.8b10076
日期:2018.12.12
A methyl group on an arene, despite its small size, can have a profound influence on biologically active molecules. Typical methods to form a methylarene involve strong nucleophiles or strong and often toxic electrophiles. We report a strategy for a new, highly efficient, copper and iodide co-catalyzed methylation of aryl- and heteroarylboronic esters with the mild, nontoxic reagent trimethylphosphate
An efficient synthetic route to biologically relevant 2-phenylbenzothiazoles substituted on the benzothiazole ring
作者:Ashley A. Weekes、Mark C. Bagley、Andrew D. Westwell
DOI:10.1016/j.tet.2011.08.004
日期:2011.10
focus on their unsubstituted ring counterparts. Here we describe a new concise and efficient synthetic route to biologically relevant 2-phenylbenzothiazoles in high yield from the reaction of substituted 2-aminothiophenol disulfides and benzaldehydes, promoted by the inexpensive and non-toxic inorganic oxidant sodiummetabisulfite in DMSO at 120 °C. Our new method is tolerant of a range of substituents
2-ANILINO NICOTINYL LINKED 2-AMINO BENZOTHIAZOLE CONJUGATES AND PROCESS FOR THE PREPARATION THEREOF
申请人:Kamal Ahmed
公开号:US20130324734A1
公开(公告)日:2013-12-05
The present invention provides compounds of general formula A useful as potential anticancer agents against human cancer cell lines and apoptosis inducers. The present invention further provides a process for the preparation of 2-anilino nicotinyl linked 2-amino benzothiazole conjugates of general formula (A), wherein R
1
═H or CI; R
2
═H, OCH
3
or F; R
3
═H, OCH
3
, F or CI; R
4
═H, OCH
3
or F and X═OCH
3
, F or N0
2
.
Cu-catalyzed in situ generation of thiol using xanthate as a thiol surrogate for the one-pot synthesis of benzothiazoles and benzothiophenes
作者:D. J. C. Prasad、G. Sekar
DOI:10.1039/c3ob26915a
日期:——
A new copper-catalyzed in situ generation of aryl thiolates strategy was successfully developed for the one-potsynthesis of substituted benzothiazoles from 2-iodoanilides using xanthate as a thiol precursor. A wide range of 2-iodoanilides with both electron-releasing and electron-withdrawing groups produced the corresponding benzothiazoles in good yields. Further, this one-pot protocol was successfully
成功开发了一种新的铜催化原位生成的芳基硫醇盐策略,该方法可使用以下方法一锅法从2-碘代苯胺合成一取代的苯并噻唑黄药作为硫醇的前体。具有电子释放基团和电子吸收基团的各种2-碘代苯胺以良好的产率产生相应的苯并噻唑。此外,该一锅法协议已成功用于合成有效的抗肿瘤药2-(3,4-二甲氧基苯基)-5-氟苯并[ d ]噻唑(PMX 610)。最后,铜催化原位生成芳基硫醇盐策略成功地用于邻卤代炔基苯的多米诺合成,该方法是使用邻卤代炔基苯黄药 作为硫醇的前体。