| Abstract: | Phenylethinyl-1,3,2]dithiaphospholane. Bis(dithiaphospholanyl)-1,4]dithiane Nucleophilic substitution of the amino group but no cycloaddition occurs in the reaction of phenyl phenylethinyl phosphinous acid diethylamide, 5 , with 2-aminothiophenol forming compound 6 . By analogous reaction, phenylethinyl phosphonic bis(diethylamide), 7 , and ethane-1,2-dithiol form compound 8 . Cycloaddition besides nucleophilic substitution is observed, however, when acetylene bis(phosphonic diethyl-amide), 9 , and ethane-1,2-dithiol are reacted resulting in compound 11 . All new products are characterized by their nmr, mass, and i.r. spectra. Furthermore, the results of an X-ray structure analysis of 11 are reported. |
