ORGANIC SPECTROSCOPY INTERNATIONAL: 4,4-Dimethoxybut-1-yne

4,4-Dimethoxybut-1-yne: 1-butyne, 4,4-dimethoxy-; 4,4-Dimethoxy-1-butyne; 4,4-Dimethoxybut-1-yne; (1) (33639-45-1)

4,4-Dimethoxybut-1-yne (1) has the following physical and spectroscopic properties: bp 62-67 °C (75 mmHg);

¹H NMR (CDCl₃, 600 MHz)
δ 2.03 (t, J = 2.7 Hz, 1 H),TRIPLE BOND H
2.53 (dd, J = 5.6, 2.7 Hz, 2 H), CH2
3.38 (s, 6 H), TWO METHOXY
4.55 (t, J = 5.6 Hz, 1 H). O-CH-O

¹³C NMR (CDCl₃, 150 MHz) δ: 23.7, 53.4, 70.2, 79.3, 102.3.

HRMS (ESI) m/z: Calcd. for C₆H₁₀O₂ [M+Na]⁺: 137.0573, found: 137.0573.

IR (cm^-1): 3289, 2938, 2834, 2124, 1447, 1423, 1362, 1240, 1192, 1120, 1064.

Anal. calcd for C₆H₁₀O₂: C, 63.14; H, 8.83. Found: C, 62.86; H, 8.86.