84472-87-7Relevant academic research and scientific papers
Tosvinyl and besvinyl as protecting groups of imides, azinones, nucleosides, sultams, and lactams. Catalytic conjugate additions to tosylacetylene
Petit, Elena,Bosch, Llus,Font, Joan,Mola, Laura,Costa, Anna M.,Vilarrasa, Jaume
, p. 8826 - 8834 (2015/01/08)
The use of the 2-(4-methylphenylsulfonyl)-ethenyl (tosvinyl, Tsv) group for the protection of the NH group of a series of imides, azinones (including AZT), inosines, and cyclic sulfonamides has been examined. The Tsvprotected derivatives are obtained in excellent yields by conjugate addition to tosylacetylene (ethynyl p-tolyl sulfone). The stereochemistry of the double bond can be controlled at will: with only 1 mol % of Et3N or with catalytic amounts of NaH, the Z stereoisomers are generated almost exclusively, while the E isomers are obtained using a stoichiometric amount of DMAP. Analogous phenylsulfonylvinyl-protected groups (with the besvinyl or Bsv group instead of Tsv) are obtained stereospecifically by reaction with (Z)- or (E)-bis(phenylsulfonyl)ethene. For lactams and oxazolidinones, this last method is much better. The Tsv and Bsv groups are stable in the presence of non-nucleophilic bases and to acids. They can be removed highly effectively via a conjugate addition-elimination mechanism using pyrrolidine or sodium dodecanethiolate as nucleophiles.
Synthesis and antineoplastic activity of 3'-azido and 3'-amino analogues of pyrimidine deoxyribonucleoside
Lin,Mancini
, p. 544 - 548 (2007/10/02)
Several new 3'-azido and 3'-amino nucleosides (8, 9, 12, and 13) have been synthesized and their biological activities evaluated. Among them, 3'-amino-2',3'-dideoxycytidine (13) was found to exhibit potent cytotoxic activity against both L1210 and S-180 cells in vitro with an ID50 of 0.7 and 4.0 μM, respectively. Furthermore, 13 has also shown antitumor activity against L1210 tumor bearing mice with a T/C x 100 value of 283.
