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Kinetically controlled ring-closing metathesis: Synthesis of a potential scaffold for 12-membered salicylic macrolides

机译:动力学控制的闭环易位:合成十二元水杨酸内酯的潜在支架。

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摘要

For the synthesis of a 12-membered salicylic macrolide scaffold, ring-closing metathesis (RCM) of a omega-diene compound was planned. The stereochemical outcome of the RCM reaction changed depending on the type of Ru catalyst that was used; a "first-generation" Grubbs catalyst produced exclusively the E isomer and "second-generation" catalysts provided a mixture of the E and Z isomers under kinetic control (not thermodynamic control). Considerations for the E/Z selectivity are described.
机译:为了合成12元水杨酸大环内酯骨架,计划了ω-二烯化合物的闭环易位(RCM)。 RCM反应的立体化学结果根据所用Ru催化剂的类型而有所不同。 “第一代” Grubbs催化剂仅生产E异构体,“第二代”催化剂在动力学控制(不是热力学控制)下提供E和Z异构体的混合物。描述了E / Z选择性的注意事项。

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