An unexpected BF3·Et2O-catalyzed rearrangement of 23E-benzylidenespirostanes to spiro[furan-indenes]
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- 作者：Manuel A. Ramos Enrí ; quez ; Marcos Flores-Á ; lamo ; Martí ; n A. Iglesias-Arteaga ; martin.iglesias@unam.mx" class="auth_mail" title="E-mail the corresponding author
- 关键词：23E-Benzylidenespirostanes ; BF3· ; Et2O-catalyzed rearrangement ; NMR ; X-ray diffraction ; Spiro[furan-indene] steroids
- 刊名：Tetrahedron Letters
- 出版年：2016
- 出版时间：25 May 2016
- 年：2016
- 卷：57
- 期：21
- 页码：2249-2252
- 全文大小：555 K
文摘
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Spirostanes react with BF3·Et2O/C6H5CHO/AcOH/CH2Cl2 to afford spiro[furan-indenes].
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Benzylidenespirostanes react with BF3·Et2O/AcOH/CH2Cl2 to afford the same compounds.
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The structure of the hereto unknown compounds were elucidated by 1D and 2D NMR.
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X-ray diffraction corroborated the proposed structures.