Direct Synthesis of a Macroscale Single-
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L. Song; L. Ci; L. Lv; Z. Zhou; X. Yan; D. Liu; H. Yuan; Y. Gao; J. Wang; L. Liu
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Article
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2004
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John Wiley and Sons
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English
β 292 KB
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of silica gel using 20 % CH 2 Cl 2 /hexane as eluant. The best fractions were pooled, evaporated, and recrystallized twice from chloroform/ acetonitrile to yield 12.2 g (23 %) of the title compound as off-white crystals, mp 178Β±181 C [11].