7,9-dideacetyl-1-deoxybaccatinVI was synthesized from 1-deoxybaccatinVI and its crystal structure was determined by X-ray crystallographic techniques. The compound (C33H42O11·2CH4O) crystallizes into monoclinic space group P21 with unit cell parameters: a=8.654(17) Å, b=16.470(5) Å, c=12.671(3) Å, β=97.63(2)°, and Z=2. The X-ray results demonstrated that the reaction of 7,9,10-Trideacetyl-1-deoxy-baccatinVI with Ac2O in tetrahydrofuran, using CeCl3 as catalyst, yielded monoacetylated product 7,9-dideacetyl-1-deoxy baccatinVI. In the structure, the six-membered A ring exhibits boat conformation, the eight-membered B ring adopts boat-chair conformation, and the six-membered C ring exhibits sofa conformation.
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Lin, HX., Han, N., Chen, JM. et al. Synthesis and crystal structure of 7,9-dideacetyl-1-deoxybaccatinVI. J Chem Crystallogr 36, 337–341 (2006). https://doi.org/10.1007/s10870-006-9069-5
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DOI: https://doi.org/10.1007/s10870-006-9069-5