Now showing items 161-170 of 187
Thermodynamics of some lanthanide trihalides III. Reinterpretation of LnCl3 Schottky anomalies
(Elsevier, 1980-08)
The heat capacities of the anhydrous lanthanide trichlorides from 5 to 350 K of Sommers and Westrum provide an excellent opportunity further to test the volumetric lattice heat-capacity approximation method. Schottky ...
Structure of the reaction product of pentaphenylgermole and diiron enneacarbonyl: [mu]-(1-(1,2,3,4-tetraphenylbutadienyl)phenylgermylene)octacarbonyldiiron(Fe---Fe)
(Elsevier, 1980-06-17)
Pentaphenylgermole (1-germa-1,2,3,4,5,-pentaphenylcyclopenta-2,4-diene) reacts with diiron enneacarbonyl in refluxing diethyl ether to produce an orange, crystalline complex. This complex was established by single crystal ...
SYN -1,4-addition of carboxylate salts to cyclic allylic epoxides mediated by cuprous chloride
(Elsevier, 1983)
A mild method for the 1,4- opening of certain cyclic allylic epoxides has been found, using sodium carboxylates in the presence of cuprous chloride.
On the dehydration of trans-1,2-dihydrophthalic acid
(Elsevier, 1980)
The epimerization/dehydration of the title compound occurs by way of an enolization rather than a pair of concerted, suprafacial [1,5] hydrogen shifts.
Carbon-13 and silicon-29 NMR spectra of some [tris(trimethylsilyl)methyl]-substituted silanes and related compounds
(Elsevier, 1982-08-24)
Fourier Transform 13C and 29Si NMR spectra are reported for series of [tris-(trimethylsilyl)methyl] dimethylsilanes, [tris(trimethylsilyl)methyl] diphenylsilanes, and for related compounds. Analysis of chemical shift values ...
Stereoselective acyclic synthesis via allylmetals: Threo vicinal diols from both - and -[gamma]-alkoxyallyltins and aldehydes
(Elsevier, 1987)
Both - and -[gamma]-alkoxyallyltins stereoselectively add to aldehydes in the presence of BF3[middle dot]OEt2 at -78[deg]C in CH2Cl2 to produce the threo (or syn) vicinal diol monoalkyl ether unit.
Assignment of the chemical shift values of N-trityl -homoserine lactone
(Elsevier, 1988)
This paper reports the correct assignment of all chemical shift values of N-trityl -homoserine lactone based on the 1H-nmr spectra of N-trityl-2S, 3R-[3-2H]- and 2S, 3S-[2,3-2H2]homoserine lactone.
Transmetallation of n-(trialkylstannyl)methylimines. A new method for the generation and cycloaddition of 2-azaallyl anions.
(Elsevier, 1988)
Transmetallation of imines 1 at -78[deg] with RLi provided 2-azaallyl anions 2, which readily undergo cycloaddition with olefinic anionophiles, providing pyrrolidines. Of particular note is the generation of unstabilized ...
A convenient synthesis of -(5'-deoxy-5'-adenosyl)- (+/-) -2-methylhomocysteine
(Elsevier, 1985)
The synthesis of -(5'-deoxy-5'-adenosyl)-+-2-methylhomocysteine in two steps from +--2-methylmethionine is described.
Rapid reductive-carboxylation of secondary amines. One pot synthesis of tertiary N-methylated amines
(Elsevier, 1985)
Various tertiary N-methylated amines were synthesized by using a new reductive-carboxylation approach. Secondary amines, on carboxylation with carbon dioxide under moderate reaction conditions, afforded their corresponding ...