... Dedicated to Professor Satoru Masamune for his enormous con- tributions to organic chemistry. ... to pH ) 6. The aqueous layer was extracted with CH2Cl2 (50 mL × 2), and the combined organic layers were ... 8 in pure form as an oil: 1H NMR (CDCl3, 400 MHz) δ 8.57 (d, J ) 1.63 Hz ...