(trans-cyclobutane-1,2-diyl)bis(methylene) bis(4-methylbenzenesulfonate);Ditosylat von Bis(hydroxymethyl-1,2)-trans-cyclobutan;[(1S,2S)-2-[(4-methylphenyl)sulfonyloxymethyl]cyclobutyl]methyl 4-methylbenzenesulfonate
Abstract The readily available cis/trans mixture of 1,2-cyclobutanedicarboxylic acid undergoes a quantitative isomerization in 12N HCl to the trans-diacid (as monitored by NMR spectroscopy). The latter is resolved to the (+)- and (-)-trans-diacids by modified literature and patented methods. The synthesis of the (S,S)-(-)-trans-diol and (S,S)-(+)-trans-ditosylate from the (S,S)-(+)-trans-diacid is