Copper-Catalyzed Cyanoalkylative Aziridination of N-Sulfonyl Allylamines
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A simple three-step procedure converted the readily accessible (2-bromo-1,1-difluoroethyl)arenes into a-aryl-a,a-difluoroacetaldehydes. Subsequent hydrocyanation, hydrolysis, oxidn. and again hydrolysis afforded b-aryl-b,b-difluoro-a-oxopropionic acids. Re ...
Good quality ab initio calcns. (MP2) show that the water adducts of BX3 and CX3+ have totally different structures (X = F-I). While all H2O-BX3 complexes have classical Cs sym. structures with strong B-O bonds and addnl. H-bonding, the heavier CX3+ cations ...
A review. The catalytic activation of C-C single bonds represents a major challenge in organometallic chem. Strained ring substrates occupy in this respect a privileged role as their inherent ring strain facilitates the desired metal insertion. Employing s ...
needed. By an optimized patterning of the evaporated indium film and the lid, surface hermetic bonding on wafer level is reached without exceeding 140 °C in any step of the procedure. Different designs of the indium metallization and lid were tested to imp ...
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Time-resolved Optical Kerr Effect (OKE) measurements were used to det. the orientational dynamics of water and acetonitrile in the bulk and in pores of ZrO2 nanostructured films. The expts. were performed with a home-built OKE microscope, capable of provid ...
The reactivity of phenolic compounds can be drastically affected by the electronic nature of the substituting groups. In this work, the effect of physico-chemical properties on the reactivity via photo-assisted Fenton catalysis is reported for several para ...
Alkylation of 2-hydroxydibenzofuran with 3-chloro-3-methyl-1-butyne, followed by Claisen rearrangement, gave access to 3,3-dimethyl-3Hbenzofuro[3,2-f][1]-benzopyran. Several derivatives modified at the pyran 1,2-double bond were prepared, including the cor ...
The IR and Raman spectra and conformations of the ionic liquid 1-ethyl-3-methyl-1H-imidazolium tetrafluoroborate, [EMIM][BF4] (6), were analyzed within the framework of scaled quantum mechanics (SQM). It was shown that SQM successfully reproduced the spect ...
N-Protected tropenone derivs. I (R = CO2Me, CBZ, Ts) prepd. from the resp. pyrroles and tetrabromoacetone, were used as starting materials for desymmetrization by hydroboration of the C-C double bond. Hydroboration of I with (-)-(Ipc)2BH followed by oxidn. ...
