with an angular hydroxy group was built via three key transformations: (1) Me3Al-catalyzed [2 + 2] cycloaddition of a ketene silyl acetal with a propiolate, (2) reductive ring-opening of a cyclic hemiketal, and (3) the intramolecular Morita–Baylis–Hillman reaction. This synthetic route represents a new and reliable strategy to obtain protoilludanes with several oxy-functional groups.
                                    实现了立体控制的化感性4-氧原丙二酮
倍半萜,美洛肽,美洛肽F以及棘孢菌素B和D的立体合成。弯曲的5/6/4具有角羟基的
三环系统是通过以下三个关键转化构建的:(1)Me 3 Al催化的[2 + 2]烯酮甲
硅烷基
缩醛与
丙酸酯的环加成反应,(2)还原环-环状半
水合物的开放,以及(3)分子内的Morita–Baylis–Hillman反应。该合成路线代表了一种新的,可靠的策略来获得具有几个氧官能团的原illilludanes。