(R)-2,3-Cyclohexylideneglyceraldehyde: a novel template for simple entry into both cis- and trans-2,5-disubstituted tetrahydrofurans
作者:Angshuman Chattopadhyay、Prasad Vichare、Bhaskar Dhotare
DOI:10.1016/j.tetlet.2007.02.093
日期:2007.4
olefin of benzoates 3a and 3b, using both AD-mix α and AD-mix β afforded only one diastereomer of diols 5a and 5b, respectively. Diols 5a and 5b were easily transformed into cis- and trans-2,5-disubstituted tetrahydrofurans 7 and 14, respectively, which were subsequently converted into known compounds 12 and 19.
使用AD-混合物α和AD-混合物β在苯甲酸酯3a和3b的末端烯烃上进行无尖锐的不对称二羟基化,分别仅提供二醇5a和5b的仅一种非对映异构体。二醇5a和5b容易分别转化为顺式和反式2,5-二取代的四氢呋喃7和14,随后将其转化为已知的化合物12和19。