´
Leticia Jime´nez-Gonza´lez, M´ıriam Alvarez-Corral,
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Manuel Mun˜oz-Dorado and Ignacio Rodr´ıguez-Garc´ıa*
Dept. Organic Chemistry, University of Almer´ıa, 04120-Almer´ıa, Spain.
E-mail: irodrigu@ual.es; Fax: +34-950-015081; Tel: +34-950-015610
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Notes and references
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reaction crudes. Careful column chromatography was needed to avoid
silica promoted protodesilylation
{ Crystal data for 14cis. C17H16O4, M 5 284.30, triclinic, space group P1,
˚
a 5 4.7090(7), b 5 8.2955(12), c 5 9.1628(13) A, a 5 92.006(2)u,
3
˚
b 5 94.865(2)u, c 5 104.989(3)u, V 5 343.9(9) A , T 5 273 K, Z 5 1,
m(Mo–Ka) 5 0.098 mm21. A total of 1568 reflections were collected, 1200
unique reflections (Rint 5 2.23) which were used in all calculations. The
final wR (F2) was 0.0697 (all data). Crystal data for 14trans. C17H16O4,
¯
M 5 284.30, triclinic, space group P1, a 5 8.0941(8), b 5 8.7487(8),
˚
c 5 10.2094(10) A, a 5 78.617(2)u, b 5 82.940(2)u, c 5 77.161(2)u,
3
V 5 688.65(11) A , T 5 273 K, Z 5 2, m(Mo–Ka) 5 0.097 mm21. A total
˚
of 3775 reflections were collected, 2407 unique reflections (Rint 5 2.37)
which were used in all calculations. The final wR (F2) was 0.1901 (all data).
for crystallographic data in CIF or other electronic format.
.
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This journal is ß The Royal Society of Chemistry 2005
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