Various monocyclic 1,2-dithiines 6a,b,d-t were prepared via (Z,Z)-1,4-difunctionalized butadienes (4–11,19,20). A twisted cyclic structure A is unequivocally proved rather than of the ringopened valence isomer B. The reactivity of these 1,2-dithiines is described. Thermal as well as day-light induced sulfur extrusion is an important feature of their chemistry. The latter mode of sulfur extrusion depends
High resolution GHz and THz (FTIR) spectroscopy and theory of parity violation and tunneling for 1,2-dithiine (C<sub>4</sub>H<sub>4</sub>S<sub>2</sub>) as a candidate for measuring the parity violating energy difference between enantiomers of chiral molecules
Our results show that this molecule is a suitable candidate for a possible first determination of the parity violating energy difference [capital Delta]pvE betweenenantiomers.
我们的结果表明,该分子是可能首先确定违反对映异构体之间的能量差[ capitalΔpv E ]的奇偶性候选物。
1,2-dithiin antiinfective agents
申请人:Shaman Pharmaceuticals, Inc.
公开号:US05556875A1
公开(公告)日:1996-09-17
This invention pertains to a novel group of 1,2-dithiin compounds useful as antiinfective agents, and a novel synthetic process to produce the same. The compounds are particularly effective in treating fungal infections, especially those caused by Candida albicans, Cryptococcus neoformans or Aspergillus fumigatus.
Ring opening of titanacyclopentadienes 1 with (SCN)2 or (SeCN)2 followed by bis(thiocyanate) or bis(selenocyanate) cyclization affords 1,2-dithiin (2 a) or 1,2-diselenin (2 b), respectively. Compound 1 gives 2 a directly on reaction with S2 Cl2 . Unsubstituted 1,2-diselenin is prepared by reaction of PhCH2 SeNa with 1,4-bis(trimethylsilyl)-1,3-butadiyne followed by reductive cleavage of the benzyl group and oxidation. The unsubstituted 2-selenathiin is prepared in an analogous manner, but from a mixture of PhCH2 SeNa and PhCH2 SNa.
Total Synthesis of Thiarubrine B [3-(3-Buten-1-ynyl)-6-(1,3-pentadiynyl)-1,2-dithiin], the Antibiotic Principle of Giant Ragweed (Ambrosia trifida)
作者:Eric Block、Chuangxing Guo、Mohan Thiruvazhi、Paul J. Toscano