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Using a procedure analogous to that used to prepare 30A, 37A (1.9 g, 5.6 mmol) was reacted with trimethyl(vinyl)silane to yield 37B (1.2 g, 90%) as a red oil. 1H NMR (400 MHz, CDCl3) δ ppm 1.14 (t, J=7.47 Hz, 6 H) 2.60 (q, J=7.62 Hz, 4 H) 5.21 (dd, J=17.80, 1.98 Hz, 1 H) 5.51 (dd, J=11.42, 1.76 Hz, 1 H) 6.64(dd, J=18.02, 11.42 Hz, 1 H) 7.18 (s, 2 H).