Perthio- and Perseleno-1,3-butadienes, -but-1-ene-3-ynes, and -[3]-cumulenes: One-Step Syntheses from 1,4-Dilithio-1,3-butadiyne
作者:Eric Block、Frank Tries、Chunhong He、Chuangxing Guo、Mohan Thiruvazhi、Paul J. Toscano
DOI:10.1021/ol034258g
日期:2003.4.1
Treatment of 1,4-dilithio-1,3-butadiyne (1) with dichalcogenides RSSR or RSeSeR affords dithio- and diseleno-1,3-butadiynes (2, 3), perthio- and perseleno-[3]-cumulenes (4, 5), perthio- and perseleno-1,3-butadienes (6, 7), and/or perthio- and perseleno-but-1-ene-3-ynes (8, 9). The products can be controlled by stoichiometry and temperature, by the presence or absence of oxygen, and by choice of the "R" group. By X-ray crystallography, hexa(methylthio)-1,3-butadiene is highly twisted, with a torsion angle [(Phi(CCCC) of 84.7degrees and an elongated C(2)-C(3) distance of 1.484(3) Angstrom.
Sulfanyl-Substituted [3]Cumulenes and Buta-1,3-dienes from a Tetrakis(pyridinium)-Substituted Butadiene
作者:Andreas Schmidt、Alireza Rahimi、Mimoza Gjikaj
DOI:10.1055/s-0029-1216861
日期:2009.7
3-dienes, or tetrakis(sulfanyl)-substituted 2,3-dichlorobuta-1,3-dienes by reactions with thiolates or a sulfinate. The outcome of the reaction depends on the reaction conditions and the substitution pattern of the starting sulfur nucleophiles. dienes and trienes - sulfides - pyridines - perchlorinated compounds - persulfurated compounds