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A novel family of room temperature ionic liquids, N,N-diethyl-N′,N′-dipropyl-N′′-hexyl-N′′-methylguanidinium iodide (SGI) and N,N,N′,N′-tetramethyl-N′′,N′′-dipentylguanidinium tricyanomethanide (SGTM) were designed and synthesized. Due to the strong charge ...
There is an increasing interest by the flavor industry for producing natural aroma compds. through biocatalysts. L-Phenylalanine is transformed by Saccharomyces cerevisiae into 2-phenylethanol, which has a rose-like odor. Unfortunately this product inhibit ...
The reactions of lithium and sodium aluminum hydride with alcs. and phenols in ether solvents were studied as a route to mono-, di- and triorganyloxyhydridoaluminates MAlH4-n(OR)n. However, the stability of these compds. towards disproportionation is stron ...
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 ...
Selective elimination of either one or two mols. of hydrogen halide from vicinal dihalides can be conveniently achieved by employing solid NaOH or KOH in the presence of solvents such as glycol di-Me ether or tetraethylene glycol di-Me ether. [on SciFinder ...
(Z)-omega-Trimethylsilyl-(omega-2)-alken-1-ols are readily accessible by consecutive superbase metalation and silylation of (omega-1)-alken-1-ols. These versatile intermediates may be oxidized to give the corresponding (Z)-omega-trimethylsilyl-(omega-2)-al ...
Eight ethers, nine esters and one ketone were submitted to a systematic structural variation by replacing a hydrogen atom in the vicinity of the oxo function by fluorine and Me. As long as steric factors dominate, a fluorine substituent alters the olfactor ...
In a case study, 1,2,3-trifluorobenzene was functionalized at each of the two vacant positions [producing the benzoic acids HO2CC6H2F3-2,3,4 F(I) and HO2CC6H2F3-3,4,5 (I)] and, in addn., bromine was introduced into all available positions of I and II. The ...
Treatment of aryl allyl ethers with catalytic amts. of Pd(PPh3)4 and NaBH4 at room temp. afforded the parent phenol in high yield under non-hydrolytic conditions. E.g., treatment of ether I (R = allyl) with NaBH4 in the presence of Pd(PPh3)4 in THF gave 97 ...
The amino-amido-thiol AT (HS-(CH2)10-CO-NH-CH2-CH2-NH2)(HS-(CH2)10-CO-NH-CH2-CH2-NH2), adsorbed on Au(111), was studied by sum frequency generation (SFG) and IR reflection absorption spectroscopy in the CH2 stretching vibration region. The SFG and IR spect ...
