A Survey on the Synthesis of Variolins, Meridianins, and Meriolins-Naturally Occurring Marine (aza)Indole Alkaloids and Their Semisynthetic Derivatives

Marine natural products are a source of essential significance due to a plethora of highly diverse biological properties. The naturally occurring (aza)indole alkaloids variolin B (1), meridianins (2), and their synthetic hybrids meriolins (3) exhibit potent kinase inhibitory activities and have aroused considerable interest in the past two decades. Therefore, the immense demand for versatile synthetic accesses to these structures has considerably increased. This review surveys the synthetic pathways to these naturally occurring alkaloids and their semisynthetic derivatives.

Automated summary

Marine natural products are highly diverse and possess a wide range of biological activities. The (aza)indole alkaloids variolin B (1), meridianins (2), and their synthetic hybrids meriolins (3) have attracted significant interest due to their potent kinase inhibitory activities. This review provides an overview of the synthetic strategies employed to access these naturally occurring alkaloids and their semisynthetic derivatives.