Without using any additives, a practical and eco-friendly methodology has been realized for the tandem double cyclization of 1,6-dienes with easily accessible azobis(alkylcarbonitriles) on water.
A concise and eco-friendly acylation/cyclization of 1,6-dienes with linear ethers under catalyst- and base-free conditions has been developed. tert-Butyl hydroperoxide (TBHP)-promoted tandem cleavage of C(sp3)–H and C(sp3)–O bonds of linear ethers is the key in this process, which provides a straightforward and efficient method to realize acylation reaction. The significant advantages of this method