Zheng-Yang Gu, Cheng-Guo Liu, Shun-Yi Wang^*（汪顺义）, and Shun-Jun Ji^*（纪顺俊）

Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University

Org. Lett., 2016, 18 (10), pp 2379–2382

Palladium-catalyzed intramolecular Heck reaction and aminopalladation of N-(2-(1-phenylvinyl)phenyl)aniline for the efficient synthesis of dihydroindeno[1,2,3-kl]acridines and 3-arylindoles via tuning of the phosphine ligands and solvents under two optimized conditions are reported. The reaction follows a 1,4-Pd migration, aminopalladation, C(sp²)–H activation, as well as five- and six-membered-ring fusion to form different products. The dihydroindeno[1,2,3-kl]acridine derivatives showed higher triplet energy (E_T) levels than common blue phosphorescent dopant and may serve as good host candidates for blue triplet emitters.

链接：http://pubs.acs.org/doi/abs/10.1021/acs.orglett.6b00843