Palladium-Catalyzed Annulation of Internal Alkynes: Direct Access to π-Conjugated Ullazines
作者:Danyang Wan、Xiaoyu Li、Ruyong Jiang、Boya Feng、Jingbo Lan、Ruilin Wang、Jingsong You
DOI:10.1021/acs.orglett.6b01182
日期:2016.6.17
rroles with alkynes has been developed to construct various π-conjugated indolizino[6,5,4,3-ija]quinolones (ullazines) with a reactive functional group tolerance. As illustrative examples, three new ullazine-based sensitizers are synthesized, and the performance of these dyes is examined in DSSC devices, which demonstrates the potential of direct C–H functionalization in the construction of organic
已开发了钯(1-(2,6-二溴苯基)-1 H-吡咯与炔烃的环化反应),以构建各种π-共轭吲哚并[6,5,4,3- ja ]喹诺酮(戊嗪),反应性官能团耐受性。作为说明性例子,合成了三种新的基于脲嗪的敏化剂,并在DSSC装置中检查了这些染料的性能,证明了在有机光电子材料构造中直接C–H功能化的潜力。
Synthesis of π-extended dibenzo[d,k]ullazines by a palladium-catalyzed double annulation using arynes
An efficient Pd-catalyzed double annulation reaction of 1-(2,6-dibromophenyl)-1H-pyrroles with arynes is developed to synthesize π-extended dibenzo[d,k]ullazines in good to excellent yields. For the first time, the parent dibenzo[d,k]ullazine core is obtained and characterized.