... [10] And the synthesis and use of vinylphosphonates have become of great importance because of their synthetic utilities [11] and fungicidal and fungistatic activities. ... 13 C NMR (CDCl 3 ): δ = 143.4, 140.1, 134.1, 133.0, 130.0, 128.2, 70.3, 48.3. ... E )-2-( p -Toluenesulfonyl)-ethenyl ...