Alkyl Sulfides as Promising Sulfur Sources: Metal-Free Synthesis of Aryl Alkyl Sulfides and Dialkyl Sulfides by Transalkylation of Simple Sulfides with Alkyl Halides
A site‐selective metal‐free dealkylative approach to synthesize aryl alkyl and symmetrical dialkyl sulfides has been developed. This procedure is convenient and has wide functional group tolerance giving rise to sulfides carrying various alkyl chains from simple alkyl sulfides and alkyl halides in good to excellent yields. This transalkylation proceeds by an ionic mechanism via sulfonium intermediates
Hybrid Dibismuthines and Distibines: Preparation and Properties of Antimony and Bismuth Oxygen, Sulfur, and Nitrogen Donor Ligands
作者:Sophie L. Benjamin、Louise Karagiannidis、William Levason、Gillian Reid、Michael C. Rogers
DOI:10.1021/om1010148
日期:2011.2.28
but for the other dibismuthine complexes, there is evidence for inequivalence of the iron centers (and hence hypervalency) only in the solid state. Spectroscopic data indicate that hypervalent interactions are absent in [CpFe(CO)2}2MeN(CH2-2-C6H4SbMe2)2}][BF4]2 and [CpFe(CO)2}2S(CH2-2-C6H4SbMe2)2}][BF4]2, but present in solid [CpFe(CO)2}2O(CH2)2SbR2}2}][BF4]2. The preparation and X-ray structure
杂二双变蛋白O (CH 2)2 BiPh 2 } 2,MeN(CH 2 -2-C 6 H 4 BiR 2)2和S(CH 2 -2-C 6 H 4 BiR 2)2(R = Me,Ph)已通过微分析,1 H和13 C 1 H} NMR光谱和FAB质谱进行了制备和表征。O (CH 2)2 BiPh 2 } 2和S(CH 2 -2-C6 H 4 BiPh 2)2显示O或S原子与两个铋中心之间接近对称的高价相互作用。锑类似物S(CH 2 -2-C 6 H 4 SbMe 2)2通过MeI季铵化为[S(CH 2 -2-C 6 H 4 SbMe 3)2 ] I 2,它也显示出高价S· ··Sb相互作用,但在这种情况下只有一个锑中心。这些和相关配体与[CpFe(CO)2 }类型的CpFe(CO)2 +基团的配合物2 L] [BF 4 ] 2(L = O (CH 2)2 BiPh 2 } 2,MeN(CH
Substituent effect on benzylic lithiation of sulfides. Synthesis of diboronic acids derived from aryl–alkyl sulfides
The relative benzylic deprotonation rate constants of aryl–benzyl sulfides have been measured and the obtained values were compared with the substituent constants using the Hammett equation and with deprotonation Gibbs energies calculated on B3LYP/aug-cc-pVDZ level. The deprotonation rate depends on the stabilization of the negative charge, which is spread over the benzene ring. The series of brominated
Heterocyclic bismuth(III) compounds with transannular S→Bi interactions. An experimental and theoretical approach
作者:Ana Toma、Ciprian I. Raţ、Anca Silvestru、Tobias Rüffer、Heinrich Lang、Michael Mehring
DOI:10.1016/j.jorganchem.2016.01.019
日期:2016.3
strongly intramolecularly coordinated to bismuth, thus resulting in hypervalent species 10-Bi-4 (for 1 and 2) and 12-Bi-5 (for 3 and 4). Intermolecular interactions (X…Hmethylene in 1 and 2, Bi…Cg in 3 and Bi…O in 4) led to polymeric chains in the crystals. DFT calculations were carried out on [(C6H4CH2)2S]BiCl and 1–4 in order to better understand the S→Bi intramolecular coordination.
Process for the preparation of trichloromethyl-substituted aromatic
申请人:Bayer Aktiengesellschaft
公开号:US04783562A1
公开(公告)日:1988-11-08
Trichloromethyl-substituted aromatic compounds are obtained by the chlorination of thioethers of the formula ##STR1## wherein Ar represents an optionally substituted aryl radial, X.sub.1 denotes hydrogen or halogen, and R.sup.1 represents optionally substituted alkyl, aralkyl, the nitrile group, an optionally substituted aryl radical or the group ##STR2## wherein Ar and X have the meaning given. The compounds, of which some are new, can be used as intermediate products for plant protection agents.