作者:Thomas Trieselmann、Reinhard W. Hoffmann、Karsten Menzel
DOI:10.1002/1099-0690(200204)2002:7<1292::aid-ejoc1292>3.0.co;2-6
日期:2002.4
Stereoselective synthesis of a series of 1,3-dioxan-4-ylmethanes 1−9 has been achieved by use of solely substrate-based asymmetric induction. The simple C2-symmetric bis(dioxanyl)methane 1 has a greater than 99% conformational preference at the two inter-ring bonds for the conformation 1a. The homologous structures 3−9 contain up to five dioxanylmethane units, maintaining a high conformational preference
一系列 1,3-二恶烷-4-基甲烷 1-9 的立体选择性合成已通过仅使用基于底物的不对称诱导实现。简单的 C2 对称双(二氧杂环己基)甲烷 1 在构象 1a 的两个环间键处具有大于 99% 的构象偏好。同源结构 3-9 包含多达五个二恶烷基甲烷单元,在每个双(二恶烷基)甲烷单元中保持高构象偏好。因此,这些柔性化合物在多达八个可旋转的环间键上达到超过 90% 的构象偏好。(© Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)