Alkynylation of Ketones on KF/Alumina
1043
d ¼ 1.43–1.75 (m, 10H), 2.10 (s, 1H), 4.86 (s, 2H), 6.80 (m, 1Harom), 7.30–
7.50 (m, 4Harom), 7.70–7.80 (m, 1Harom), 8.20–8.40 (m, 1Harom). 13C-NMR
(CDCl3): d ¼ 22.95 (2C), 24.90, 39.52 (2C), 56.20, 68.32, 78.91, 91.36,
105.75, 120.85, 121.91, 124.80, 125.09, 125.39, 126.22, 127.25, 134.12,
153.48. MS (EI): m/z ¼ 41 (38), 55 (35), 115 (28), 152 (88), 171 (62), 181
(100), 209 (53), 233 (42), 262 (22), 280 (93) [Mþ]. HRMS (EI): m/z calcd.
for C19H20O2: 280.1463; found: 280.1464.
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