Abstract
Many natural products and biologically important complex organic scaffolds have convoluted
structures around their core skeleton. Interestingly, with just changing the outskirts,
the core reflects new and unique degrees of various physical and chemical properties.
A very common but intriguing core is a five-membered ring horning heaps of organic
molecules crafts. The power of [3+2] cycloaddition reactions to generate five-membered
ring systems allocate chemists to envision synthetic procedures of wonder molecules
and if it is facilitating a cascade sequence, then the end product will imbibe significant
level of complexity having applications in medicinal and pharmaceutical fields. This
Account highlights the broad interest in assembling recent advances in cascade reactions
involving [3+2] cycloaddition as the power tool in order to conceive breakthrough
organic architectures reported in the last ten years. We foresee that our comprehensive
collection of astonishing [3+2] cycloaddition enabled cascades will provide valuable
insights to polycyclic molecular construction and perseverant approach towards nonconventional
synthetic procedures to the organic community.
1 Introduction
2 Synthesis of Oxindoles Skeleton
3 Synthesis of Oxazoles Skeleton
4 Synthesis of Oxadiazoles Skeleton
5 Synthesis of Nitrogen-Containing Heterocycles
6 Synthesis via Formal [3+2] Cycloaddition
7 Synthesis of Miscellaneous Scaffolds
8 Conclusion
Key words
cascade - five-membered - stereoselective - regioselective - [3+2] cycloaddition
