Synthetic studies towards arcutinidine: An alternative strategy for construction of the complete carbon framework

Total Synthesis of Berkeleyone A and Preaustinoid A through Epoxypolyene Cyclization

A bioinspired Lewis acid-catalyzed epoxypolyene cyclization was developed to construct the tetracyclic framework containing a bicyclo[3.3.1]nonane core and seven chiral centers. The usage of this approach for assembling these natural products of 6/6/6/6 tetracyclic skeleton with bicyclo[3.3.1]nonane core is demonstrated by the total synthesis of highly oxidized berkeleyone A and preaustinoid A.

Controllable skeletal reorganizations in natural product synthesis

Covering: 2016 to 2023The synthetic chemistry community is always in pursuit of efficient routes to natural products. Among the many available general strategies, skeletal reorganization, which involves the formation, cleavage, and migration of C-C and C-heteroatom bonds, stands out as a particularly useful approach for the efficient assembly of molecular skeletons. In addition, it allows for late-stage modification of natural products for quick access to other family members or unnatural derivatives. This review summarizes efficient syntheses of steroid, terpenoid, and alkaloid natural products that have been achieved by means of this strategy in the past eight years. Our goal is to illustrate the strategy's potency and reveal the spectacular human ingenuity demonstrated in its use and development.