54299-08-0Relevant academic research and scientific papers
Ligand-free Ag(I)-catalyzed carboxylation of terminal alkynes with CO 2
Zhang, Xiao,Zhang, Wen-Zhen,Ren, Xiang,Zhang, Lin-Lin,Lu, Xiao-Bing
supporting information; experimental part, p. 2402 - 2405 (2011/06/25)
Chemical equations presented. A convenient approach to selectively prepare a wide range of functionalized propiolic acids was developed by AgI-catalyzed carboxylation of terminal alkynes using carbon dioxide as carboxylative agent under ligand-free conditions.
Synthesis of 2-acetylenic carboxylic acids, 1-sulfinyl and 1-sulfonyl- 2-ketones from 2-acetylenic phenyl sulfides
Fortes, Carlos C.,Garrote, Clevia F.D.
, p. 2993 - 3026 (2007/10/03)
Monochlorination at the 1-position with sulfuryl chloride, followed by methanolysis converted 2-acetylenic phenyl sulfides into 1-methoxy-2- acetylenic phenyl sulfides. Oxidation with chromic acid gave 2-acetylenic carboxylic acids. Oxidation of 2-acetylenic phenyl sulfides with Oxone and hydrogen peroxide in acetic acid gave the corresponding sulfoxides and sulfones respectively. Diethylamine addition to the triple bond produced enamines which were hydrolyzed with aqueous hydrochloric acid to the corresponding 1-sulfinyl and 1-sulfonyl-2-ketones.
Structure-antitumor activity relationship of semi-synthetic spicamycin derivatives
Sakai,Kawai,Kamishohara,Odagawa,Suzuki,Uchida,Kawasaki,Tsuruo,Otake
, p. 1467 - 1480 (2007/10/03)
New derivatives of spicamycin modified at the fatty acid moieties of the molecule were synthesized and their structure-activity relationships were examined. The antitumor activity was greatly influenced by modification of the fatty acid moieties to tetradecadienoyl or dodecadienoyl analogues exhibiting better antitumor activity against COL-1 human colon cancer xenograft than SPM VIII.
