Restriction of the conrotatory motion in photo-induced 6π electrocyclic reaction: formation of the excited state of the closed-ring isomer in the cyclization

Restriction of the molecular geometry opens up a novel pathway in the cyclization reaction of a photochromic dithiazolylarylene derivative.

Synthesis of fused heterocyclic systems via the Mallory photoreaction of arylthienylethenes

A facile and functional group tolerant electrocyclic reaction of styrylthiophenes which allows the synthesis of a series of new tricyclic π-conjugated systems with 39%–74% overall yields is reported.

Recent Advances on the Application of Electrocyclic Reactions in Complex Natural Product Synthesis

The electrocyclic reaction is one of the most powerful tools for the construction of complex polycyclic scaffolds in a highly stereocontrolled fashion. In this review, recent advances in its application in the total synthesis of representative natural products are discussed, with the aim of providing a complement to existing reviews.1 Introduction2 4π Electrocyclization2.1 Neutral 4π Electrocyclization2.2 Cationic 4π Electrocyclization3 6π Electrocyclization3.1 All-Carbon 6π Electrocyclization3.2 Oxa-6π Electrocyclization3.3 Aza-6π Electrocyclization3.4 Retro-6π Electrocyclization4 8π Electrocyclization5 Conclusion and Outlook

tert-Butyl nitrite (TBN) as the N atom source for the synthesis of substituted cinnolines with 2-vinylanilines and a relevant mechanism was studied

A green method to synthesize cinnolines by 6π electrocyclic reaction with alkenyl amines and TBN has been developed.