A new synthesis of 1,7-dioxaspiro[5.5]undec-4-enes via metallated allenol ethers. A formal synthesis of talaromycins A and B
作者:Richard Whitby、Philip Kocieński
DOI:10.1039/c39870000906
日期:——
acid-catalysed ring closure to 1,7-dioxaspiro[5.5]undec-4-enes; by this route (6S*,9S*)-9-ethyl-1,7-dioxaspiro [5.5]undec-4-ene (15b) has been prepared which has previously been converted into talaromycins A and B.
经由相应的锂衍生物对甲氧基丙二烯进行顺序二烷基化,得到1,3-二烷基化的甲氧基丙二烯,其经酸催化的闭环反应成1,7-二氧杂螺并[5.5]十一烷基-4-烯;通过这种途径,已经制备了(6 S *,9 S *)-9-乙基-1,7-二恶唑螺[5.5]十一碳-4-烯(15b),其先前已被转化为他洛霉素A和B。