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After fractional distillation in vacua, colorless oily 6 was obtained which was sensitive to moisture. Bp 110 "C/0.1 mmHg; <5H(300 MHz; CDClj; TMS) 5.00-4.20 (m, 4H), 3.58 [dd, V(H, H) 10.9, V(H, H), 3.2, 1H], 3.10 [dd, V(H, H) 10.6, V(H, H) 8.8, 1H], 1.28 [d, V(H, H) 6.1, 18H]; <5F(60 MHz; CDC13; TFA) 0.3 [d, V(H, F) 5.4].
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After fractional distillation in vacua, colorless oily 6 was obtained which was sensitive to moisture. Bp 110 "C/0.1 mmHg; <5H(300 MHz; CDClj; TMS) 5.00-4.20 (m, 4H), 3.58 [dd, V(H, H) 10.9, V(H, H), 3.2, 1H], 3.10 [dd, V(H, H) 10.6, V(H, H) 8.8, 1H], 1.28 [d, V(H, H) 6.1, 18H]; <5F(60 MHz; CDC13; TFA) 0.3 [d, V(H, F) 5.4].
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