Rad Jugoslavenske akademije znanosti i umjetnosti, Volume 448

1S)-(+)-percamphoric acid 4-methylsulphinyl-4-methylthiobutyrate added dropwise afforded Anal analytical sample aqueous assignment asymmetric Balenović butyric acid butyric acid 3c calc calc'd CHCI CHCl Chem colourless combined Compounds cooled corresponding Croatia crystallized Deljac derivatives determined diamond-lattice diethyl ether distilled disulphoxides dried ethereal solution evaporated to dryness EXPERIMENTAL extracted filtered filtrate gave heated isomer JUGOSLAVENSKE AKADEMIJE ZNANOSTI Laboratory lactone methanol Method methyl methylthio mmol Montanari NMR spectra obtained oily opposite optical rotation Organic oxidation oxidation with 1S)-(+)-percamphoric Prelog preparative TLC prepared propane proposed Pure Pyrolysis r)-meso R=phthalimido reaction mixture Recrystallization from EtOH reduced pressure Related remaining removed Research respectively resulting SCH3 Scheme separated shifts sign of optical Silica Gel SOCH SOCH3 sodium solvent standing stereoisomers stirring Strossmayerov trg 14 structure sulphides sulphoxides summarized synthesis t-butyl Table temperature Tetrahedron torr transition washed y-lactone yellow Zagreb ZNANOSTI I UMJETNOSTI