The synthesis of epi-epoxydon utilising the Baylis–Hillman reaction

Expedient Baylis–Hillman reaction protocol to functionalize cyclohexa-2,4-dienones

Several masked o-benzoquinone (MOBs) derivatives successfully took part in the Baylis–Hillman reaction with various aldehydes and ketones to furnish the corresponding condensation products in this study.

Efficient, scalable asymmetric synthesis of an epoxy quinol via Noyori desymmetrization of a meso diketone

Epoxy quinol 1a was prepared on a multi-gram scale by Noyori transfer hydrogenative desymmetrization of the readily available meso epoxy diketone 4. Although the intrinsic enantioselectivity for the desymmetrization was modest (82:18 er at 4% conversion), a highly enantiopure product (99.6:0.4 er) could be obtained in one operation in 44% yield via kinetic resolution of the minor enantiomer with long reaction times (48 h), or in 73% yield by combination with an enzymatic resolution of a 93:7 er mixture.

Ionic Liquid-Immobilized Quinuclidine-Catalyzed Morita−Baylis−Hillman Reactions

[reaction: see text] The ionic liquid-bound quinuclidine catalyzed Baylis-Hillman reactions were investigated. The IL-supported catalyst showed equally good catalytic activity as compared with its nonimmobilized counterpart. The corresponding Baylis-Hillman adducts were obtained in moderate to high yields in all the cases tested. The IL-supported quinuclidine can be readily recovered and reused six times without significant loss of catalytic activity.