“…Evaporative distillation (0.2 mm, 60 °C) yielded 0.29 g (35%) of product: IR (film) 1775,1100 cm-1; NMR (CCLt, 60 MHz) 2.6 (broad, -CH2CO) and 3.4 (s, -OCH3); mass spectrum m/e (rel intensity) 112 (55, M+ -CH2CO), 111 (44), 97 (56), 84 (30), 72 (26), 67 (32), 55 (55), 43 (51), 41 (100), 40 (73), 39 (61). l-(2,4,6-Trimethylbenzoxy)-7-chloro-cis-bicyclo[4.2.0]oc-tan-8-one (10).7 To an anhydrous acetone solution of 1.0 g (5.2 mmol) of 7,7-dichloro-cís-bicyclo [4.2.0] octan-8-one (6) was added a solution of 0.85 g (5.2 mmol) of 2,4,6-trimethylbenzoic acid and 0.52 g (5.2 mmol) of triethylamine in 10 mL of acetone. The reaction mixture was stirred under nitrogen for 15 min.…”