Some choline derivatives

Synthesis of 4‐Oxo‐1,2,3,4‐tetrahydropyridine (2,3‐Dihydro‐4(1H)pyridinone)

“…Such compounds have also been obtained by other procedures: An example by Hebky et aZ. [3] showed that they are accessible by catalytic hydrogenation of pyridones; Stiitz et al…”

“…Such compounds have also been obtained by other procedures: An example by Hebky et aZ. [3] showed that they are accessible by catalytic hydrogenation of pyridones; Stiitz et al[4] found an opposite mode of access: dehydrogenation of an N-alkyl piperidone occurred following a peracid and acetic anhydridelbase treatment by means of a modified type of the Polonovsky reaction. A total synthetic route to some 2,6-disubstituted 4-oxo-l,2,3,4tetrahydropyridines is reported by Szsgiyamas group 1' 51 condensing Schiff-bases with dialkali salts of Bdiketones.…”

Structure–Toxicity Relationships of Iodinated Aromatic Carbonates and Related Compounds

“…Several GLC methods were reported for the determination of serum cholesterol (2)(3)(4)(5)(6)(7)(8); however, a procedure was required to determine quantitatively cholesterol and other sterols in a single sample. Additionally, a small sample size and the least number of manipulations consistent with precise and accurate analysis were desirable objectives.…”

Ortho Esters

“…2-Chloroethanol with an electronegative substituent in the β-position gives complete transesterification of ethyl orthoformate [44].…”

“…For example, 2-chloroethyl groups can be converted to 2-vinyl groups [124,139]. The 2-chloroethyl group can also react with a variety of groups such as trimethylamine to give quaternary salts [140]. ( …”