TY - JOUR AU - Li, Yantao; Xu, Wentao; Zhu, Chengjian; Xie, Jin TI - Direct Deoxygenative Intramolecular Acylation of Biarylcarboxylic Acids SN - 0936-5214 SN - 1437-2096 PY - 2021 JO - Synlett JF - Synlett LA - EN VL - 32 IS - 04 SP - 387 EP - 390 ET - 2020/08/21 DA - 2021/02/16 KW - photocatalytic KW - deoxygenation KW - triphenylphosphine KW - radical cyclization KW - flow chemistry AB - A photocatalyzed intramolecular cyclization is developed for the synthesis of fluorenones. In this photoredox reaction, triphenylphosphine is used as an inexpensive and effective deoxygenative reagent for biarylcarboxylic acids to give acyl radicals, which quickly undergo intramolecular radical cyclization. Reactions in the presence of air and continuous flow photoredox technology demonstrate the generality and practicality of this process. PB - © Georg Thieme Verlag DO - 10.1055/s-0040-1707246 UR - http://www.thieme-connect.com/products/ejournals/abstract/10.1055/s-0040-1707246 ER -