反应详情

By replacing in the above procedure cis-2,6,6-trimethyl-1-[1-hydroxy-2-butenyl]-1-cyclohexene by cis-2,6,6-trimethyl-1-[1-hydroxy-2-butenyl]-2-cyclohexene, trans-2,6,6-trimethyl-1-crotonoyl-2-cyclohexene was obtained which had the following characteristics: NMR spectrum: δ=0.83 ppm, (3 H, s); 0.92 ppm, (3 H, s); 1.55 ppm, (3 H, s broad); 1.89 ppm, (d of d, J=6.5 and 1.1 cps); 1.0-2.3 ppm (4 H, complex band); 2.77 ppm, (1 H, s broad); 5.52 ppm, (1 H, s broad); 6.18 ppm, (1 H, d of q, J=16 cps and 1.1 cps); 6.77 ppm, (1 H, d of q, J=16 cps and 6.5 cps).