CHEM01200604012 Dibakar Goswami - Homi Bhabha National ...
CHEM01200604012 Dibakar Goswami - Homi Bhabha National ...
CHEM01200604012 Dibakar Goswami - Homi Bhabha National ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
(2R,3R)-1,2-Cyclohexylidenedioxy-5-hexene-3-ol 68a. colourless oil; R f = 0.80 (20%<br />
24<br />
EtOAc/hexane); [α] D +5.3 (c 1.24, CHCl3 ); IR: 3451, 1640, 1098, 1042 cm -1 ; 1 H NMR: δ<br />
1.25-1.37 (m, 2H), 1.56-1.61 (m, 8H), 2.22 (t, J = 6.5 Hz, 2H), 2.31(d, J = 4.8 Hz, D 2 O<br />
exchangeable, 1H), 3.52-3.58 (m, 1H), 3.68-3.76 (m, 1H), 3.93-4.02 (m, 2H), 5.06-5.16<br />
(m, 2H), 5.77-5.91 (m, 1H); 13 C NMR: δ 23.5, 23.7, 24.8, 34.5, 35.9, 37.9, 65.4, 71.3, 77.8,<br />
109.6, 117.4, 133.8.<br />
(2R,3S)-1,2-Cyclohexylidenedioxy-5-hexene-3-ol 68b. colourless oil; R f = 0.73 (20%<br />
24<br />
EtOAc/hexane; [α] D +10.2 (c 1.38, CHCl3 ); IR: 3453, 1642, 1101, 1044 cm -1 ; 1 H NMR: δ<br />
1.36-1.38 (m, 2H), 1.55-1.59 (m, 8H), 2.13-2.33 (m overlapped with broad s, 3H), 3.71-<br />
3.79 (m, 1H), 3.88-4.01 (m, 3H), 5.13-5.16 (m, 2H), 5.75-5.88 (m,1H); 13 C NMR: δ 24.1,<br />
24.3, 25.5, 35.2, 36.6, 38.0, 65.2, 71.0, 78.0, 110.0, 118.6, 134.4.<br />
(2R,3R,4R)-1,2-Cyclohexylidenedioxy-4-methyl-5-hexen-3-ol 69a. colourless oil; R f =<br />
24<br />
0.83 (20% EtOAc/hexane); [α] D +47.1 (c 1.41, CHCl3 ); IR: 3408, 1648, 990 cm -1 ; 1 H<br />
NMR: δ 1.09 (d, J = 6.8 Hz, 3H), 1.33-1.58 (m, 10H), 2.22-2.30 (m, 1H), 2.68 (broad s,<br />
1H), 3.31-3.39 (m, 1H), 3.71-3.76 (m, 1H), 3.93-4.15 (m, 2H), 4.98-5.08 (m, 2H), 5.68-<br />
5.84 (m, 1H); 13 C NMR: δ 12.4, 16.9, 23.9, 25.1, 35.0, 36.2, 41.3, 65.7, 74.6, 75.4, 109.6,<br />
112.8, 139.6.<br />
(2R,3S,4R)-1,2-Cyclohexylidenedioxy-4-methyl-5-hexen-3-ol 69b. colourless oil; R f =<br />
24<br />
0.75 (20% EtOAc/hexane); [α] D +29.7 (c 1.45, CHCl3 ); IR: 3400, 1651, 995 cm -1 ; 1 H<br />
NMR: δ 1.09 (d, J = 6.8 Hz, 3H), 1.39-1.61 (m, 10H), 1.81 (broad s, 1H), 2.19-2.29 (m,<br />
1H), 3.63-3.69 (m, 1H), 3.83-3.99 (m, 2H), 4.06-4.15 (m, 1H), 5.02-5.09 (m, 2H), 5.65-<br />
5.82 (m, 1H); 13 C NMR: δ 12.5, 17.4, 24.1, 25.4, 35.3, 35.8, 41.2, 65.4, 74.7, 75.6, 109.2,<br />
114.1, 138.8.<br />
121