Cross-Coupling of Alkyl Redox-Active Esters with Benzophenone Imines: Tandem Photoredox and Copper Catalysis
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New conditions have been found for the desulfitative Mizoroki-Heck arylation and trifluoromethylation of mono- and disubustituted olefins with arenesulfonyl and trifluoromethanesulfonyl chlorides. Thus (E)1,2-disubstituted alkenes with high stereoselectivi ...
The conversion of 2,2-difluoro-1,3-benzodioxole, an exceptionally acidic arene, via a 4-lithiated intermediate into more than three dozen new derivs. was conceived as a case study. The lithiated species was trapped by C0-electrophiles (4-toluenesulfonyl az ...
Described are compounds that are capable of forming adlayers, said compounds comprising at least one headgroup A, an optional linker B, a polymer C, a terminal group D and an optionally present crosslinking group R, wherein the headgroup A is a compound of ...
The Garcia-Gonzalez reaction Of D-glucose and ethyl acetoacetate generated ethyl 5-[(1'S)-D-erythrosyl]-2-methyl-3-furoate (5), which was converted to ethyl 5-[(1'R)-1',4'-dideoxy-1',4'-imino-D-erythrosyl]-2-methyl-3-furoate (3c) and to ethyl 5-[(1'S)-1',4 ...
The key step in the trans-selective modification of the Wittig reaction is the a-lithiation of the lithium bromide coordinated ylide-aldehyde adduct (the so-called "P-betaine"). The olefination reactions were carried out for RCHO and [R1CH2PPh3]Br (R = C ...
A review describes the monitoring techniques applied to polymn. reactions in supercrit. fluids. Different available techniques, as well as the coupling of anal. and calorimetric measurements. This kind of coupling could be one soln. to the problem of simul ...
The reaction of the anilines RNH2 [R = C6H4(o-CN), C6H4(p-CN), C6H4(m-CN), C6H4(o-C6H5), C6F5 and C6H4(o-CF3)] with Ph2PCl and inorganic or organic bases in differing stoichiometry and in different solvents has been studied. The electronic properties and s ...
Efficient methods for the stereoselective synthesis of polyfunctional (E)- and (2)-alkenes and conjugated (EE)- and (E,2)-dienones are presented. They rely upon one-pot, four-component processes that condense 1-oxy-1,3-dienes, silyl enol ethers, SO2, and c ...
Solid epoxy resins are produced at Vantico SA by catalyzed reactions of a low-mol. wt. liq. resin (RBL) with bisphenol A (BPA). These reactions lead to solid epoxy resins, which are used in surface coatings or adhesives. The chain lengthening step (advance ...