“…The organic phase was dried with sodium sulfate. After removal of the solvent, the resulting yellow oil was distilled under vacuum to give 3 (5.31 g, 73%) as a yellow oil which solidified after cooling: bp 129°C (10 Torr); mp 40°C (lit [3] A similar reaction of 6 (0.65 g, 5.8 mmol) with dimethyl sulfoxide (1.19 g, 15 mmol) and oxalyl chloride (1.65 g, 13 mmol), followed by the addition of triethylamine (2.70 g, 27 mmol) provided 3 (0.43 g, 61%).…”