The natural α-amino acid phenylhydrazides 1a−d readily react with the aldehydes 2a−d and ketones 2e−h to produce the 3-(phenylamino)imidazolidin-4-one derivatives 4 in good yields. Their structures were confirmed by X-ray structural analysis. Polycyclic systems were obtained from the reaction of L-tryptophan phenylhydrazide (1d) and L-histidine phenylhydrazide (1e) with benzaldehyde (2c), which gave 1,10-di-

No abstract

A 1:1 adduct produced in the reaction of nitrosobenzene (2) with 1,3,5‐tris(4‐methoxyphenyl)‐1,3,5‐triazinane (3) has been shown by X‐ray diffraction structure analysis to be the N′‐(4‐methoxyphenyl)‐N‐phenyl‐N‐oxyformamidinium species 5.

An improvement in the procedure for investigation of organic acids and a new derivatization method, amenable to gas chromatographic-mass spectrometric detection of alcohols, are presented. The latter is based on the formation of phenacetyl esters. The simultaneous application of the two methods also allows data to be obtained on some volatile neutrals present in complex natural aqueous fluids. Application to wine and cider vinegars allowed detection of a number of previously unreported components, among which are interesting partially esterified polycarboxylic esters.

No abstract