“…Chromatography of 1.185 g of this material on silica gel gave 42.0 mg of 2a and 396.0 mg (55%) of 6a. Distillation in a microstill gave pure 6methyltricyclo[5.3.0.0l'6]decan-2-one (6a) as a clear liquid: IR 2970,1670,1475,1455,1395,1342,1315,1275,1180,1130,1055,920 cm-'; NMR 2.50-2.90 (m,2H), 1.20-2.30 (br m, 11 ), 1.07 ppm (s, 3 H); UV (isooctane) Xmax 278 (26); mass spectrum m/e 164 (M+), 149,146,136,135,131,121,108,107,93 (base peak), 91, 79, 77, 67. Anal. Caled for Cj j Hj^O: C, 80.44; H, 9.82.…”