Extremely mild (no metal Lewis acid catalyst, ambient temperature) and experimentally simple (no high-pressure apparatus needed) conditions were established for the Diels–Alder reaction between sterically demanding 1,3,3-trisubstituted-2-vinylcyclohexenes and non-symmetrically substituted quinones. This allowed for the successful implementation of a highly convergent strategy to the cassane-type furanoditerpenoid
建立了空间需求的1,3,3-三取代-2-
乙烯基环己烯与非对称的Diels-Alder反应的极温和的条件(不需要
金属
路易斯酸催化剂,环境温度)和实验上简单的条件(不需要高压设备)取代的醌。这使得可以成功地将高度收敛的策略应用于木薯型
呋喃二萜骨架。