CONVERSION OF trans,trans-1-METHOXY-3,5-DIARYL-2-OXABICYKLODEC-3-ENES INTO HEMIDITHIOACETALS AND 4H-THIOPYRANS. STRUCTURE OF trans,trans-1-MERCAPTO-3-PHENYL-5-(4-METHOXYPHENYL)-2-THIABICYCLODEC-3-ENE

Article abstract of DOI:10.1007/BF00515417

The conversion of trans,trans-1-methoxy-3,5-diaryl-2-oxabicyclo<4.4.0>dec-3-enes into trans,trans-1-mercapto-3,5-diaryl-thiabicyclo<4.4.0>dec-3-enes or 2,4-diaryl-5,6-tetramethylene-4H-thiopyrans, which takes place when hydrogen sulfide is reacted with the acetals in acetic acid with the use of gaseous hydrogen chloride as a catalyst, has been described.A mechanism for reaction has been proposed.The structure and conformations of the molecules have been determined by x-ray diffraction analysis and (13)C NMR.