... Issue. European Journal of Organic Chemistry. ... The organic layer was washed until neutral, dried with Na 2 SO 4 , and distilled at 105–115 °C (bath temp.)/3 mbar to yield the liquid ester 4 (101 mg, 57 %). ... 1 H, p-H), 7.30 (disturbed m, ca. 2 H, 2 × m-H), 7.39 (dm, 3 J = 7.5 Hz, ca. ...