Fujisawa and Kobayashi purging unreacted COCl2 and HC1, the reaction mixture was cooled in Dry Ice-acetone, and the precipitate formed was filtered, washed with a small portion of CCU, and dried in vacuo to give 2.6 g (51%, based on COCl2) of 19, which was recrystallized twice from acetone to give pale yellow plates: mp 151-153°; nmr (CDC1.) r 2.44 (s, 1 H), 2.72 (s, 1 H), 7.22 (s, 3 H), 7.52 (s, 3 H), and 7.61 (s, 3 H).